./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix011_power.oepc_pso.oepc_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix011_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix011_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix011_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 11:56:17,328 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 11:56:17,371 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 11:56:17,374 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 11:56:17,374 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 11:56:17,388 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 11:56:17,388 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 11:56:17,388 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 11:56:17,389 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 11:56:17,389 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 11:56:17,389 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 11:56:17,390 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 11:56:17,390 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 11:56:17,390 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 11:56:17,391 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 11:56:17,391 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 11:56:17,391 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 11:56:17,392 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 11:56:17,392 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 11:56:17,392 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 11:56:17,393 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 11:56:17,396 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 11:56:17,396 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 11:56:17,396 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 11:56:17,396 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 11:56:17,397 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 11:56:17,397 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 11:56:17,397 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 11:56:17,397 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 11:56:17,398 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 11:56:17,398 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 11:56:17,398 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 11:56:17,398 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:56:17,399 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 11:56:17,399 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 11:56:17,399 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 11:56:17,399 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 11:56:17,402 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 11:56:17,403 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 11:56:17,403 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 11:56:17,403 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 11:56:17,404 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 11:56:17,404 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 11:56:17,405 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 11:56:17,632 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 11:56:17,648 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 11:56:17,651 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 11:56:17,652 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 11:56:17,653 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 11:56:17,654 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix011_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-14 11:56:17,817 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 11:56:17,818 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 11:56:17,820 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix011_power.oepc_pso.oepc_rmo.oepc.i [2024-06-14 11:56:18,909 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 11:56:19,084 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 11:56:19,084 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix011_power.oepc_pso.oepc_rmo.oepc.i [2024-06-14 11:56:19,110 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/845557d41/72473894d7924d59bb081a6a1fa38e0f/FLAG83d61d3ef [2024-06-14 11:56:19,122 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/845557d41/72473894d7924d59bb081a6a1fa38e0f [2024-06-14 11:56:19,123 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 11:56:19,123 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 11:56:19,124 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 11:56:19,124 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 11:56:19,128 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 11:56:19,128 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:56:17" (1/2) ... [2024-06-14 11:56:19,129 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32e2f49c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:56:19, skipping insertion in model container [2024-06-14 11:56:19,129 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:56:17" (1/2) ... [2024-06-14 11:56:19,130 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3e3c232 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:56:19, skipping insertion in model container [2024-06-14 11:56:19,130 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:56:19" (2/2) ... [2024-06-14 11:56:19,130 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32e2f49c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:56:19, skipping insertion in model container [2024-06-14 11:56:19,131 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:56:19" (2/2) ... [2024-06-14 11:56:19,131 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 11:56:19,206 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 11:56:19,207 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] ((((((((((((((((((((! multithreaded || a$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) [2024-06-14 11:56:19,207 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] ((((((((((((((((((((! multithreaded || a$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) [2024-06-14 11:56:19,207 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] ((((((((((((((((((((! multithreaded || a$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) [2024-06-14 11:56:19,207 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 11:56:19,207 INFO L106 edCorrectnessWitness]: ghost_update [L849-L849] multithreaded = 1; [2024-06-14 11:56:19,242 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 11:56:19,590 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:56:19,600 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 11:56:19,709 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:56:19,737 INFO L206 MainTranslator]: Completed translation [2024-06-14 11:56:19,738 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:56:19 WrapperNode [2024-06-14 11:56:19,738 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 11:56:19,739 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 11:56:19,740 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 11:56:19,740 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 11:56:19,745 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:56:19" (1/1) ... [2024-06-14 11:56:19,768 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:56:19" (1/1) ... [2024-06-14 11:56:19,803 INFO L138 Inliner]: procedures = 175, calls = 49, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 128 [2024-06-14 11:56:19,803 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 11:56:19,804 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 11:56:19,804 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 11:56:19,804 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 11:56:19,812 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:56:19" (1/1) ... [2024-06-14 11:56:19,812 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:56:19" (1/1) ... [2024-06-14 11:56:19,815 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:56:19" (1/1) ... [2024-06-14 11:56:19,832 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-14 11:56:19,841 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:56:19" (1/1) ... [2024-06-14 11:56:19,841 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:56:19" (1/1) ... [2024-06-14 11:56:19,852 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:56:19" (1/1) ... [2024-06-14 11:56:19,868 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:56:19" (1/1) ... [2024-06-14 11:56:19,879 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:56:19" (1/1) ... [2024-06-14 11:56:19,881 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:56:19" (1/1) ... [2024-06-14 11:56:19,886 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 11:56:19,886 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 11:56:19,887 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 11:56:19,887 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 11:56:19,887 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:56:19" (1/1) ... [2024-06-14 11:56:19,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:56:19,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 11:56:19,918 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-14 11:56:19,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-14 11:56:19,975 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 11:56:19,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 11:56:19,975 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 11:56:19,976 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 11:56:19,976 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 11:56:19,976 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 11:56:19,976 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 11:56:19,976 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 11:56:19,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 11:56:19,977 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 11:56:19,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 11:56:19,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 11:56:19,978 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 11:56:20,116 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 11:56:20,118 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 11:56:20,438 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 11:56:20,438 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 11:56:20,637 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 11:56:20,638 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 11:56:20,639 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:56:20 BoogieIcfgContainer [2024-06-14 11:56:20,639 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 11:56:20,643 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 11:56:20,643 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 11:56:20,645 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 11:56:20,646 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:56:17" (1/4) ... [2024-06-14 11:56:20,646 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c4e7487 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 11:56:20, skipping insertion in model container [2024-06-14 11:56:20,646 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 11:56:19" (2/4) ... [2024-06-14 11:56:20,646 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c4e7487 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 11:56:20, skipping insertion in model container [2024-06-14 11:56:20,647 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:56:19" (3/4) ... [2024-06-14 11:56:20,647 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c4e7487 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 11:56:20, skipping insertion in model container [2024-06-14 11:56:20,647 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:56:20" (4/4) ... [2024-06-14 11:56:20,648 INFO L112 eAbstractionObserver]: Analyzing ICFG mix011_power.oepc_pso.oepc_rmo.oepc.i [2024-06-14 11:56:20,660 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 11:56:20,661 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 11:56:20,661 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 11:56:20,705 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 11:56:20,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 44 transitions, 100 flow [2024-06-14 11:56:20,780 INFO L124 PetriNetUnfolderBase]: 0/41 cut-off events. [2024-06-14 11:56:20,781 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:56:20,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 41 events. 0/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 11:56:20,784 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 44 transitions, 100 flow [2024-06-14 11:56:20,788 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 35 transitions, 79 flow [2024-06-14 11:56:20,803 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 11:56:20,811 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@78b76b9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 11:56:20,812 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 11:56:20,818 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 11:56:20,818 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 11:56:20,818 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:56:20,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:20,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 11:56:20,820 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:20,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:20,825 INFO L85 PathProgramCache]: Analyzing trace with hash -969480644, now seen corresponding path program 1 times [2024-06-14 11:56:20,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:20,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813898456] [2024-06-14 11:56:20,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:20,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:20,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:21,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:21,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:21,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813898456] [2024-06-14 11:56:21,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813898456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:21,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:21,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 11:56:21,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583011563] [2024-06-14 11:56:21,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:21,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 11:56:21,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:21,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 11:56:21,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 11:56:22,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:56:22,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:22,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:22,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:56:22,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:22,392 INFO L124 PetriNetUnfolderBase]: 1659/2576 cut-off events. [2024-06-14 11:56:22,392 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-06-14 11:56:22,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5142 conditions, 2576 events. 1659/2576 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12911 event pairs, 1184 based on Foata normal form. 1/2507 useless extension candidates. Maximal degree in co-relation 5127. Up to 2465 conditions per place. [2024-06-14 11:56:22,411 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 35 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-14 11:56:22,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 183 flow [2024-06-14 11:56:22,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 11:56:22,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 11:56:22,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2024-06-14 11:56:22,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-14 11:56:22,423 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 79 flow. Second operand 3 states and 78 transitions. [2024-06-14 11:56:22,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 183 flow [2024-06-14 11:56:22,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 178 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 11:56:22,429 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 106 flow [2024-06-14 11:56:22,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-14 11:56:22,433 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2024-06-14 11:56:22,434 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 106 flow [2024-06-14 11:56:22,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:22,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:22,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:22,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 11:56:22,434 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:22,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:22,435 INFO L85 PathProgramCache]: Analyzing trace with hash 337041307, now seen corresponding path program 1 times [2024-06-14 11:56:22,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:22,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668221320] [2024-06-14 11:56:22,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:22,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:22,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:23,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:23,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:23,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668221320] [2024-06-14 11:56:23,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668221320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:23,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:23,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 11:56:23,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087176265] [2024-06-14 11:56:23,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:23,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 11:56:23,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:23,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 11:56:23,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-14 11:56:23,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:56:23,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:23,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:23,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:56:23,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:23,636 INFO L124 PetriNetUnfolderBase]: 1653/2577 cut-off events. [2024-06-14 11:56:23,636 INFO L125 PetriNetUnfolderBase]: For 483/483 co-relation queries the response was YES. [2024-06-14 11:56:23,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5768 conditions, 2577 events. 1653/2577 cut-off events. For 483/483 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12997 event pairs, 1038 based on Foata normal form. 3/2553 useless extension candidates. Maximal degree in co-relation 5753. Up to 2441 conditions per place. [2024-06-14 11:56:23,647 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 42 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-14 11:56:23,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 250 flow [2024-06-14 11:56:23,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:56:23,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:56:23,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-06-14 11:56:23,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-14 11:56:23,650 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 106 flow. Second operand 4 states and 100 transitions. [2024-06-14 11:56:23,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 55 transitions, 250 flow [2024-06-14 11:56:23,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 55 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 11:56:23,651 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 142 flow [2024-06-14 11:56:23,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-14 11:56:23,652 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2024-06-14 11:56:23,652 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 142 flow [2024-06-14 11:56:23,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:23,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:23,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:23,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 11:56:23,653 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:23,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:23,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1858347141, now seen corresponding path program 1 times [2024-06-14 11:56:23,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:23,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467882045] [2024-06-14 11:56:23,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:23,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:23,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:24,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:24,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:24,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467882045] [2024-06-14 11:56:24,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467882045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:24,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:24,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:56:24,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89367087] [2024-06-14 11:56:24,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:24,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:56:24,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:24,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:56:24,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:56:24,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:56:24,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:24,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:24,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:56:24,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:25,016 INFO L124 PetriNetUnfolderBase]: 1661/2603 cut-off events. [2024-06-14 11:56:25,016 INFO L125 PetriNetUnfolderBase]: For 1388/1388 co-relation queries the response was YES. [2024-06-14 11:56:25,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6431 conditions, 2603 events. 1661/2603 cut-off events. For 1388/1388 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13188 event pairs, 812 based on Foata normal form. 5/2584 useless extension candidates. Maximal degree in co-relation 6414. Up to 2387 conditions per place. [2024-06-14 11:56:25,030 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 55 selfloop transitions, 16 changer transitions 0/77 dead transitions. [2024-06-14 11:56:25,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 77 transitions, 404 flow [2024-06-14 11:56:25,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:56:25,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:56:25,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-14 11:56:25,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-14 11:56:25,034 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 142 flow. Second operand 5 states and 130 transitions. [2024-06-14 11:56:25,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 77 transitions, 404 flow [2024-06-14 11:56:25,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 77 transitions, 390 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 11:56:25,036 INFO L231 Difference]: Finished difference. Result has 53 places, 52 transitions, 241 flow [2024-06-14 11:56:25,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=241, PETRI_PLACES=53, PETRI_TRANSITIONS=52} [2024-06-14 11:56:25,037 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 8 predicate places. [2024-06-14 11:56:25,037 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 52 transitions, 241 flow [2024-06-14 11:56:25,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:25,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:25,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:25,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 11:56:25,038 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:25,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:25,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1774187770, now seen corresponding path program 1 times [2024-06-14 11:56:25,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:25,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657853619] [2024-06-14 11:56:25,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:25,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:25,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:26,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:26,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:26,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657853619] [2024-06-14 11:56:26,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657853619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:26,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:26,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:56:26,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547547165] [2024-06-14 11:56:26,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:26,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:56:26,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:26,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:56:26,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:56:26,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:56:26,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 52 transitions, 241 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:26,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:26,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:56:26,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:26,984 INFO L124 PetriNetUnfolderBase]: 1669/2615 cut-off events. [2024-06-14 11:56:26,984 INFO L125 PetriNetUnfolderBase]: For 3180/3183 co-relation queries the response was YES. [2024-06-14 11:56:26,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7550 conditions, 2615 events. 1669/2615 cut-off events. For 3180/3183 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13270 event pairs, 666 based on Foata normal form. 7/2598 useless extension candidates. Maximal degree in co-relation 7530. Up to 2373 conditions per place. [2024-06-14 11:56:26,996 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 62 selfloop transitions, 20 changer transitions 0/88 dead transitions. [2024-06-14 11:56:26,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 88 transitions, 531 flow [2024-06-14 11:56:26,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:56:26,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:56:26,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-14 11:56:26,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5795454545454546 [2024-06-14 11:56:26,998 INFO L175 Difference]: Start difference. First operand has 53 places, 52 transitions, 241 flow. Second operand 6 states and 153 transitions. [2024-06-14 11:56:26,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 88 transitions, 531 flow [2024-06-14 11:56:27,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 88 transitions, 523 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-14 11:56:27,001 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 314 flow [2024-06-14 11:56:27,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=314, PETRI_PLACES=59, PETRI_TRANSITIONS=56} [2024-06-14 11:56:27,002 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 14 predicate places. [2024-06-14 11:56:27,002 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 314 flow [2024-06-14 11:56:27,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:27,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:27,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:27,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 11:56:27,003 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:27,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:27,004 INFO L85 PathProgramCache]: Analyzing trace with hash -834752700, now seen corresponding path program 1 times [2024-06-14 11:56:27,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:27,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961950048] [2024-06-14 11:56:27,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:27,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:27,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:28,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:28,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:28,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961950048] [2024-06-14 11:56:28,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961950048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:28,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:28,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:56:28,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065792612] [2024-06-14 11:56:28,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:28,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:56:28,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:28,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:56:28,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:56:28,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:56:28,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 56 transitions, 314 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:28,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:28,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:56:28,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:29,058 INFO L124 PetriNetUnfolderBase]: 1681/2635 cut-off events. [2024-06-14 11:56:29,059 INFO L125 PetriNetUnfolderBase]: For 5024/5027 co-relation queries the response was YES. [2024-06-14 11:56:29,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8421 conditions, 2635 events. 1681/2635 cut-off events. For 5024/5027 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13372 event pairs, 502 based on Foata normal form. 12/2623 useless extension candidates. Maximal degree in co-relation 8398. Up to 2341 conditions per place. [2024-06-14 11:56:29,073 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 66 selfloop transitions, 23 changer transitions 0/95 dead transitions. [2024-06-14 11:56:29,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 95 transitions, 632 flow [2024-06-14 11:56:29,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:56:29,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:56:29,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-14 11:56:29,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5584415584415584 [2024-06-14 11:56:29,075 INFO L175 Difference]: Start difference. First operand has 59 places, 56 transitions, 314 flow. Second operand 7 states and 172 transitions. [2024-06-14 11:56:29,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 95 transitions, 632 flow [2024-06-14 11:56:29,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 95 transitions, 583 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 11:56:29,080 INFO L231 Difference]: Finished difference. Result has 61 places, 58 transitions, 341 flow [2024-06-14 11:56:29,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=341, PETRI_PLACES=61, PETRI_TRANSITIONS=58} [2024-06-14 11:56:29,081 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 16 predicate places. [2024-06-14 11:56:29,081 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 58 transitions, 341 flow [2024-06-14 11:56:29,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:29,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:29,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:29,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 11:56:29,082 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:29,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:29,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1527270789, now seen corresponding path program 1 times [2024-06-14 11:56:29,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:29,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833775824] [2024-06-14 11:56:29,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:29,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:29,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:29,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:29,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:29,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833775824] [2024-06-14 11:56:29,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833775824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:29,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:29,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:56:29,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401718533] [2024-06-14 11:56:29,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:29,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:56:29,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:29,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:56:29,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:56:29,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:56:29,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 58 transitions, 341 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:29,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:29,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:56:29,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:30,249 INFO L124 PetriNetUnfolderBase]: 1676/2622 cut-off events. [2024-06-14 11:56:30,249 INFO L125 PetriNetUnfolderBase]: For 6848/6848 co-relation queries the response was YES. [2024-06-14 11:56:30,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8941 conditions, 2622 events. 1676/2622 cut-off events. For 6848/6848 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 13277 event pairs, 659 based on Foata normal form. 2/2600 useless extension candidates. Maximal degree in co-relation 8917. Up to 2484 conditions per place. [2024-06-14 11:56:30,271 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 55 selfloop transitions, 8 changer transitions 0/69 dead transitions. [2024-06-14 11:56:30,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 69 transitions, 495 flow [2024-06-14 11:56:30,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:56:30,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:56:30,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 102 transitions. [2024-06-14 11:56:30,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636363636363636 [2024-06-14 11:56:30,273 INFO L175 Difference]: Start difference. First operand has 61 places, 58 transitions, 341 flow. Second operand 5 states and 102 transitions. [2024-06-14 11:56:30,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 69 transitions, 495 flow [2024-06-14 11:56:30,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 69 transitions, 431 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 11:56:30,279 INFO L231 Difference]: Finished difference. Result has 61 places, 58 transitions, 301 flow [2024-06-14 11:56:30,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=301, PETRI_PLACES=61, PETRI_TRANSITIONS=58} [2024-06-14 11:56:30,281 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 16 predicate places. [2024-06-14 11:56:30,281 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 58 transitions, 301 flow [2024-06-14 11:56:30,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:30,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:30,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:30,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 11:56:30,282 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:30,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:30,282 INFO L85 PathProgramCache]: Analyzing trace with hash -112774731, now seen corresponding path program 1 times [2024-06-14 11:56:30,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:30,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877654636] [2024-06-14 11:56:30,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:30,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:30,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:30,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:30,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:30,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877654636] [2024-06-14 11:56:30,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877654636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:30,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:30,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:56:30,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979966552] [2024-06-14 11:56:30,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:30,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:56:30,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:30,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:56:30,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:56:30,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:56:30,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 58 transitions, 301 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:30,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:30,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:56:30,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:31,565 INFO L124 PetriNetUnfolderBase]: 1967/3062 cut-off events. [2024-06-14 11:56:31,565 INFO L125 PetriNetUnfolderBase]: For 9000/9000 co-relation queries the response was YES. [2024-06-14 11:56:31,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10287 conditions, 3062 events. 1967/3062 cut-off events. For 9000/9000 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15354 event pairs, 795 based on Foata normal form. 2/3061 useless extension candidates. Maximal degree in co-relation 10261. Up to 2896 conditions per place. [2024-06-14 11:56:31,579 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 60 selfloop transitions, 11 changer transitions 0/76 dead transitions. [2024-06-14 11:56:31,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 76 transitions, 501 flow [2024-06-14 11:56:31,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:56:31,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:56:31,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-14 11:56:31,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4356060606060606 [2024-06-14 11:56:31,581 INFO L175 Difference]: Start difference. First operand has 61 places, 58 transitions, 301 flow. Second operand 6 states and 115 transitions. [2024-06-14 11:56:31,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 76 transitions, 501 flow [2024-06-14 11:56:31,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 76 transitions, 479 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 11:56:31,586 INFO L231 Difference]: Finished difference. Result has 63 places, 61 transitions, 335 flow [2024-06-14 11:56:31,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=335, PETRI_PLACES=63, PETRI_TRANSITIONS=61} [2024-06-14 11:56:31,587 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 18 predicate places. [2024-06-14 11:56:31,587 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 61 transitions, 335 flow [2024-06-14 11:56:31,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:31,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:31,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:31,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 11:56:31,588 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:31,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:31,589 INFO L85 PathProgramCache]: Analyzing trace with hash -584068164, now seen corresponding path program 1 times [2024-06-14 11:56:31,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:31,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557290513] [2024-06-14 11:56:31,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:31,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:31,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:32,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:32,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:32,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557290513] [2024-06-14 11:56:32,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557290513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:32,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:32,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:56:32,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440761785] [2024-06-14 11:56:32,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:32,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:56:32,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:32,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:56:32,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:56:32,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:56:32,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 61 transitions, 335 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:32,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:32,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:56:32,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:32,925 INFO L124 PetriNetUnfolderBase]: 1856/2951 cut-off events. [2024-06-14 11:56:32,925 INFO L125 PetriNetUnfolderBase]: For 11476/11482 co-relation queries the response was YES. [2024-06-14 11:56:32,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10568 conditions, 2951 events. 1856/2951 cut-off events. For 11476/11482 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15273 event pairs, 727 based on Foata normal form. 8/2955 useless extension candidates. Maximal degree in co-relation 10542. Up to 2663 conditions per place. [2024-06-14 11:56:32,940 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 58 selfloop transitions, 19 changer transitions 0/84 dead transitions. [2024-06-14 11:56:32,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 84 transitions, 589 flow [2024-06-14 11:56:32,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:56:32,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:56:32,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-06-14 11:56:32,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48863636363636365 [2024-06-14 11:56:32,943 INFO L175 Difference]: Start difference. First operand has 63 places, 61 transitions, 335 flow. Second operand 6 states and 129 transitions. [2024-06-14 11:56:32,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 84 transitions, 589 flow [2024-06-14 11:56:32,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 84 transitions, 557 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 11:56:32,953 INFO L231 Difference]: Finished difference. Result has 65 places, 64 transitions, 375 flow [2024-06-14 11:56:32,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=375, PETRI_PLACES=65, PETRI_TRANSITIONS=64} [2024-06-14 11:56:32,955 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 20 predicate places. [2024-06-14 11:56:32,956 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 64 transitions, 375 flow [2024-06-14 11:56:32,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:32,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:32,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:32,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 11:56:32,957 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:32,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:32,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1171629722, now seen corresponding path program 2 times [2024-06-14 11:56:32,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:32,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363294455] [2024-06-14 11:56:32,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:32,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:32,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:33,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:33,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:33,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363294455] [2024-06-14 11:56:33,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363294455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:33,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:33,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:56:33,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308132988] [2024-06-14 11:56:33,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:33,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:56:33,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:33,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:56:33,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:56:33,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:56:33,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 64 transitions, 375 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:33,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:33,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:56:33,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:34,332 INFO L124 PetriNetUnfolderBase]: 1841/2925 cut-off events. [2024-06-14 11:56:34,332 INFO L125 PetriNetUnfolderBase]: For 13354/13354 co-relation queries the response was YES. [2024-06-14 11:56:34,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10801 conditions, 2925 events. 1841/2925 cut-off events. For 13354/13354 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15100 event pairs, 723 based on Foata normal form. 2/2924 useless extension candidates. Maximal degree in co-relation 10774. Up to 2704 conditions per place. [2024-06-14 11:56:34,346 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 61 selfloop transitions, 11 changer transitions 0/79 dead transitions. [2024-06-14 11:56:34,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 79 transitions, 557 flow [2024-06-14 11:56:34,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:56:34,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:56:34,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-14 11:56:34,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 11:56:34,347 INFO L175 Difference]: Start difference. First operand has 65 places, 64 transitions, 375 flow. Second operand 6 states and 120 transitions. [2024-06-14 11:56:34,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 79 transitions, 557 flow [2024-06-14 11:56:34,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 79 transitions, 528 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 11:56:34,353 INFO L231 Difference]: Finished difference. Result has 68 places, 64 transitions, 376 flow [2024-06-14 11:56:34,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=376, PETRI_PLACES=68, PETRI_TRANSITIONS=64} [2024-06-14 11:56:34,354 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 23 predicate places. [2024-06-14 11:56:34,354 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 64 transitions, 376 flow [2024-06-14 11:56:34,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:34,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:34,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:34,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 11:56:34,355 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:34,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:34,355 INFO L85 PathProgramCache]: Analyzing trace with hash 798952248, now seen corresponding path program 1 times [2024-06-14 11:56:34,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:34,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961721705] [2024-06-14 11:56:34,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:34,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:34,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:35,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:35,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:35,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961721705] [2024-06-14 11:56:35,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961721705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:35,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:35,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:56:35,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228591564] [2024-06-14 11:56:35,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:35,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:56:35,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:35,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:56:35,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:56:35,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:56:35,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 64 transitions, 376 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:35,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:35,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:56:35,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:35,784 INFO L124 PetriNetUnfolderBase]: 1948/3011 cut-off events. [2024-06-14 11:56:35,784 INFO L125 PetriNetUnfolderBase]: For 15615/15615 co-relation queries the response was YES. [2024-06-14 11:56:35,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11345 conditions, 3011 events. 1948/3011 cut-off events. For 15615/15615 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14913 event pairs, 753 based on Foata normal form. 4/3012 useless extension candidates. Maximal degree in co-relation 11317. Up to 2848 conditions per place. [2024-06-14 11:56:35,801 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 68 selfloop transitions, 14 changer transitions 0/87 dead transitions. [2024-06-14 11:56:35,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 87 transitions, 614 flow [2024-06-14 11:56:35,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:56:35,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:56:35,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-14 11:56:35,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 11:56:35,802 INFO L175 Difference]: Start difference. First operand has 68 places, 64 transitions, 376 flow. Second operand 7 states and 133 transitions. [2024-06-14 11:56:35,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 87 transitions, 614 flow [2024-06-14 11:56:35,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 87 transitions, 567 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 11:56:35,810 INFO L231 Difference]: Finished difference. Result has 69 places, 67 transitions, 395 flow [2024-06-14 11:56:35,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=395, PETRI_PLACES=69, PETRI_TRANSITIONS=67} [2024-06-14 11:56:35,810 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 24 predicate places. [2024-06-14 11:56:35,810 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 67 transitions, 395 flow [2024-06-14 11:56:35,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:35,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:35,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:35,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 11:56:35,811 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:35,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:35,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1179660042, now seen corresponding path program 1 times [2024-06-14 11:56:35,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:35,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299213588] [2024-06-14 11:56:35,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:35,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:35,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:36,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:36,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:36,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299213588] [2024-06-14 11:56:36,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299213588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:36,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:36,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:56:36,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986584407] [2024-06-14 11:56:36,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:36,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:56:36,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:36,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:56:36,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:56:36,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:56:36,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 67 transitions, 395 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:36,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:36,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:56:36,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:37,292 INFO L124 PetriNetUnfolderBase]: 1970/3078 cut-off events. [2024-06-14 11:56:37,293 INFO L125 PetriNetUnfolderBase]: For 18554/18560 co-relation queries the response was YES. [2024-06-14 11:56:37,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12101 conditions, 3078 events. 1970/3078 cut-off events. For 18554/18560 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15550 event pairs, 740 based on Foata normal form. 5/3079 useless extension candidates. Maximal degree in co-relation 12072. Up to 2770 conditions per place. [2024-06-14 11:56:37,308 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 68 selfloop transitions, 26 changer transitions 0/99 dead transitions. [2024-06-14 11:56:37,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 99 transitions, 743 flow [2024-06-14 11:56:37,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:56:37,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:56:37,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-14 11:56:37,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675324675324675 [2024-06-14 11:56:37,310 INFO L175 Difference]: Start difference. First operand has 69 places, 67 transitions, 395 flow. Second operand 7 states and 144 transitions. [2024-06-14 11:56:37,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 99 transitions, 743 flow [2024-06-14 11:56:37,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 99 transitions, 701 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 11:56:37,319 INFO L231 Difference]: Finished difference. Result has 71 places, 74 transitions, 476 flow [2024-06-14 11:56:37,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=476, PETRI_PLACES=71, PETRI_TRANSITIONS=74} [2024-06-14 11:56:37,319 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 26 predicate places. [2024-06-14 11:56:37,320 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 74 transitions, 476 flow [2024-06-14 11:56:37,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:37,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:37,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:37,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 11:56:37,321 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:37,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:37,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1960784596, now seen corresponding path program 2 times [2024-06-14 11:56:37,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:37,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133018732] [2024-06-14 11:56:37,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:37,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:37,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:38,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:38,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:38,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133018732] [2024-06-14 11:56:38,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133018732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:38,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:38,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:56:38,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583385809] [2024-06-14 11:56:38,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:38,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:56:38,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:38,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:56:38,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:56:38,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:56:38,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 74 transitions, 476 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:38,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:38,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:56:38,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:38,678 INFO L124 PetriNetUnfolderBase]: 1981/3093 cut-off events. [2024-06-14 11:56:38,679 INFO L125 PetriNetUnfolderBase]: For 22356/22356 co-relation queries the response was YES. [2024-06-14 11:56:38,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12966 conditions, 3093 events. 1981/3093 cut-off events. For 22356/22356 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15574 event pairs, 732 based on Foata normal form. 2/3092 useless extension candidates. Maximal degree in co-relation 12936. Up to 2885 conditions per place. [2024-06-14 11:56:38,694 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 77 selfloop transitions, 19 changer transitions 0/101 dead transitions. [2024-06-14 11:56:38,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 101 transitions, 828 flow [2024-06-14 11:56:38,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:56:38,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:56:38,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-14 11:56:38,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2024-06-14 11:56:38,696 INFO L175 Difference]: Start difference. First operand has 71 places, 74 transitions, 476 flow. Second operand 7 states and 136 transitions. [2024-06-14 11:56:38,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 101 transitions, 828 flow [2024-06-14 11:56:38,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 101 transitions, 790 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-14 11:56:38,708 INFO L231 Difference]: Finished difference. Result has 75 places, 80 transitions, 554 flow [2024-06-14 11:56:38,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=554, PETRI_PLACES=75, PETRI_TRANSITIONS=80} [2024-06-14 11:56:38,708 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 30 predicate places. [2024-06-14 11:56:38,708 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 80 transitions, 554 flow [2024-06-14 11:56:38,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:38,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:38,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:38,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 11:56:38,709 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:38,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:38,710 INFO L85 PathProgramCache]: Analyzing trace with hash -921594178, now seen corresponding path program 3 times [2024-06-14 11:56:38,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:38,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787481168] [2024-06-14 11:56:38,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:38,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:38,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:39,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:39,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:39,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787481168] [2024-06-14 11:56:39,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787481168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:39,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:39,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:56:39,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288935601] [2024-06-14 11:56:39,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:39,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:56:39,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:39,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:56:39,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:56:39,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:56:39,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 80 transitions, 554 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:39,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:39,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:56:39,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:40,074 INFO L124 PetriNetUnfolderBase]: 1976/3086 cut-off events. [2024-06-14 11:56:40,074 INFO L125 PetriNetUnfolderBase]: For 25850/25850 co-relation queries the response was YES. [2024-06-14 11:56:40,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13344 conditions, 3086 events. 1976/3086 cut-off events. For 25850/25850 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15603 event pairs, 732 based on Foata normal form. 2/3085 useless extension candidates. Maximal degree in co-relation 13312. Up to 2898 conditions per place. [2024-06-14 11:56:40,091 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 80 selfloop transitions, 14 changer transitions 0/99 dead transitions. [2024-06-14 11:56:40,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 99 transitions, 790 flow [2024-06-14 11:56:40,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:56:40,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:56:40,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-14 11:56:40,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 11:56:40,092 INFO L175 Difference]: Start difference. First operand has 75 places, 80 transitions, 554 flow. Second operand 7 states and 132 transitions. [2024-06-14 11:56:40,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 99 transitions, 790 flow [2024-06-14 11:56:40,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 99 transitions, 738 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-14 11:56:40,107 INFO L231 Difference]: Finished difference. Result has 79 places, 80 transitions, 538 flow [2024-06-14 11:56:40,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=538, PETRI_PLACES=79, PETRI_TRANSITIONS=80} [2024-06-14 11:56:40,108 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 34 predicate places. [2024-06-14 11:56:40,108 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 80 transitions, 538 flow [2024-06-14 11:56:40,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:40,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:40,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:40,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 11:56:40,110 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:40,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:40,110 INFO L85 PathProgramCache]: Analyzing trace with hash -2045730303, now seen corresponding path program 1 times [2024-06-14 11:56:40,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:40,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122746075] [2024-06-14 11:56:40,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:40,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:40,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:40,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:40,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:40,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122746075] [2024-06-14 11:56:40,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122746075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:40,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:40,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:56:40,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137068915] [2024-06-14 11:56:40,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:40,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:56:40,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:40,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:56:40,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:56:40,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:56:40,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 80 transitions, 538 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:40,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:40,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:56:40,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:41,298 INFO L124 PetriNetUnfolderBase]: 2486/3721 cut-off events. [2024-06-14 11:56:41,299 INFO L125 PetriNetUnfolderBase]: For 37962/37962 co-relation queries the response was YES. [2024-06-14 11:56:41,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16703 conditions, 3721 events. 2486/3721 cut-off events. For 37962/37962 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 17869 event pairs, 990 based on Foata normal form. 1/3719 useless extension candidates. Maximal degree in co-relation 16669. Up to 3628 conditions per place. [2024-06-14 11:56:41,321 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 73 selfloop transitions, 10 changer transitions 0/92 dead transitions. [2024-06-14 11:56:41,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 92 transitions, 760 flow [2024-06-14 11:56:41,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:56:41,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:56:41,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-14 11:56:41,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787878787878788 [2024-06-14 11:56:41,323 INFO L175 Difference]: Start difference. First operand has 79 places, 80 transitions, 538 flow. Second operand 6 states and 100 transitions. [2024-06-14 11:56:41,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 92 transitions, 760 flow [2024-06-14 11:56:41,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 92 transitions, 722 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 11:56:41,344 INFO L231 Difference]: Finished difference. Result has 80 places, 85 transitions, 575 flow [2024-06-14 11:56:41,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=575, PETRI_PLACES=80, PETRI_TRANSITIONS=85} [2024-06-14 11:56:41,345 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 35 predicate places. [2024-06-14 11:56:41,345 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 85 transitions, 575 flow [2024-06-14 11:56:41,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:41,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:41,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:41,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 11:56:41,346 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:41,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:41,346 INFO L85 PathProgramCache]: Analyzing trace with hash 2081430743, now seen corresponding path program 1 times [2024-06-14 11:56:41,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:41,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262370612] [2024-06-14 11:56:41,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:41,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:41,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:42,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:42,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:42,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262370612] [2024-06-14 11:56:42,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262370612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:42,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:42,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:56:42,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820894345] [2024-06-14 11:56:42,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:42,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:56:42,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:42,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:56:42,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:56:42,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:56:42,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 85 transitions, 575 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:42,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:42,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:56:42,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:43,114 INFO L124 PetriNetUnfolderBase]: 1964/3080 cut-off events. [2024-06-14 11:56:43,114 INFO L125 PetriNetUnfolderBase]: For 37665/37668 co-relation queries the response was YES. [2024-06-14 11:56:43,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14673 conditions, 3080 events. 1964/3080 cut-off events. For 37665/37668 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 15873 event pairs, 720 based on Foata normal form. 4/3080 useless extension candidates. Maximal degree in co-relation 14637. Up to 2716 conditions per place. [2024-06-14 11:56:43,129 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 77 selfloop transitions, 27 changer transitions 0/116 dead transitions. [2024-06-14 11:56:43,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 116 transitions, 889 flow [2024-06-14 11:56:43,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:56:43,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:56:43,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-14 11:56:43,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744318181818182 [2024-06-14 11:56:43,132 INFO L175 Difference]: Start difference. First operand has 80 places, 85 transitions, 575 flow. Second operand 8 states and 167 transitions. [2024-06-14 11:56:43,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 116 transitions, 889 flow [2024-06-14 11:56:43,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 116 transitions, 857 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-14 11:56:43,147 INFO L231 Difference]: Finished difference. Result has 85 places, 88 transitions, 642 flow [2024-06-14 11:56:43,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=543, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=642, PETRI_PLACES=85, PETRI_TRANSITIONS=88} [2024-06-14 11:56:43,147 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 40 predicate places. [2024-06-14 11:56:43,148 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 88 transitions, 642 flow [2024-06-14 11:56:43,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:43,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:43,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:43,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 11:56:43,148 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:43,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:43,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1351260827, now seen corresponding path program 1 times [2024-06-14 11:56:43,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:43,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805551712] [2024-06-14 11:56:43,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:43,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:43,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:44,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:44,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:44,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805551712] [2024-06-14 11:56:44,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805551712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:44,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:44,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:56:44,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033578142] [2024-06-14 11:56:44,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:44,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:56:44,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:44,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:56:44,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:56:44,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:56:44,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 88 transitions, 642 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:44,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:44,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:56:44,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:44,884 INFO L124 PetriNetUnfolderBase]: 2151/3306 cut-off events. [2024-06-14 11:56:44,884 INFO L125 PetriNetUnfolderBase]: For 44274/44277 co-relation queries the response was YES. [2024-06-14 11:56:44,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16428 conditions, 3306 events. 2151/3306 cut-off events. For 44274/44277 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16590 event pairs, 689 based on Foata normal form. 8/3310 useless extension candidates. Maximal degree in co-relation 16391. Up to 2852 conditions per place. [2024-06-14 11:56:44,903 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 85 selfloop transitions, 37 changer transitions 0/128 dead transitions. [2024-06-14 11:56:44,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 128 transitions, 1108 flow [2024-06-14 11:56:44,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:56:44,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:56:44,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-14 11:56:44,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715909090909091 [2024-06-14 11:56:44,905 INFO L175 Difference]: Start difference. First operand has 85 places, 88 transitions, 642 flow. Second operand 8 states and 166 transitions. [2024-06-14 11:56:44,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 128 transitions, 1108 flow [2024-06-14 11:56:44,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 128 transitions, 1035 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 11:56:44,928 INFO L231 Difference]: Finished difference. Result has 88 places, 98 transitions, 757 flow [2024-06-14 11:56:44,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=757, PETRI_PLACES=88, PETRI_TRANSITIONS=98} [2024-06-14 11:56:44,929 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 43 predicate places. [2024-06-14 11:56:44,929 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 98 transitions, 757 flow [2024-06-14 11:56:44,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:44,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:44,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:44,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 11:56:44,930 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:44,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:44,930 INFO L85 PathProgramCache]: Analyzing trace with hash 2085240178, now seen corresponding path program 1 times [2024-06-14 11:56:44,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:44,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453258293] [2024-06-14 11:56:44,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:44,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:44,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:45,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:45,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:45,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453258293] [2024-06-14 11:56:45,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453258293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:45,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:45,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:56:45,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39967888] [2024-06-14 11:56:45,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:45,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:56:45,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:45,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:56:45,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:56:46,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:56:46,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 98 transitions, 757 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:46,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:46,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:56:46,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:46,771 INFO L124 PetriNetUnfolderBase]: 2162/3322 cut-off events. [2024-06-14 11:56:46,772 INFO L125 PetriNetUnfolderBase]: For 50185/50188 co-relation queries the response was YES. [2024-06-14 11:56:46,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17578 conditions, 3322 events. 2162/3322 cut-off events. For 50185/50188 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16699 event pairs, 720 based on Foata normal form. 2/3320 useless extension candidates. Maximal degree in co-relation 17539. Up to 2993 conditions per place. [2024-06-14 11:56:46,803 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 84 selfloop transitions, 37 changer transitions 0/127 dead transitions. [2024-06-14 11:56:46,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 127 transitions, 1169 flow [2024-06-14 11:56:46,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:56:46,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:56:46,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-14 11:56:46,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-14 11:56:46,804 INFO L175 Difference]: Start difference. First operand has 88 places, 98 transitions, 757 flow. Second operand 7 states and 147 transitions. [2024-06-14 11:56:46,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 127 transitions, 1169 flow [2024-06-14 11:56:46,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 127 transitions, 1124 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-14 11:56:46,859 INFO L231 Difference]: Finished difference. Result has 92 places, 101 transitions, 832 flow [2024-06-14 11:56:46,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=712, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=832, PETRI_PLACES=92, PETRI_TRANSITIONS=101} [2024-06-14 11:56:46,859 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 47 predicate places. [2024-06-14 11:56:46,860 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 101 transitions, 832 flow [2024-06-14 11:56:46,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:46,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:46,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:46,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 11:56:46,860 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:46,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:46,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1351260610, now seen corresponding path program 2 times [2024-06-14 11:56:46,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:46,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113578408] [2024-06-14 11:56:46,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:46,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:46,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:47,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:47,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:47,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113578408] [2024-06-14 11:56:47,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113578408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:47,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:47,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:56:47,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794292448] [2024-06-14 11:56:47,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:47,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:56:47,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:47,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:56:47,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:56:47,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:56:47,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 101 transitions, 832 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:47,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:47,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:56:47,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:48,558 INFO L124 PetriNetUnfolderBase]: 2173/3338 cut-off events. [2024-06-14 11:56:48,558 INFO L125 PetriNetUnfolderBase]: For 55656/55659 co-relation queries the response was YES. [2024-06-14 11:56:48,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18002 conditions, 3338 events. 2173/3338 cut-off events. For 55656/55659 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16804 event pairs, 720 based on Foata normal form. 2/3336 useless extension candidates. Maximal degree in co-relation 17960. Up to 3005 conditions per place. [2024-06-14 11:56:48,591 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 84 selfloop transitions, 37 changer transitions 0/127 dead transitions. [2024-06-14 11:56:48,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 127 transitions, 1244 flow [2024-06-14 11:56:48,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:56:48,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:56:48,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-14 11:56:48,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-14 11:56:48,593 INFO L175 Difference]: Start difference. First operand has 92 places, 101 transitions, 832 flow. Second operand 7 states and 143 transitions. [2024-06-14 11:56:48,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 127 transitions, 1244 flow [2024-06-14 11:56:48,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 127 transitions, 1129 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 11:56:48,641 INFO L231 Difference]: Finished difference. Result has 94 places, 104 transitions, 844 flow [2024-06-14 11:56:48,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=727, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=844, PETRI_PLACES=94, PETRI_TRANSITIONS=104} [2024-06-14 11:56:48,641 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 49 predicate places. [2024-06-14 11:56:48,642 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 104 transitions, 844 flow [2024-06-14 11:56:48,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:48,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:48,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:48,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 11:56:48,642 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:48,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:48,643 INFO L85 PathProgramCache]: Analyzing trace with hash 654781945, now seen corresponding path program 2 times [2024-06-14 11:56:48,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:48,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91589187] [2024-06-14 11:56:48,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:48,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:48,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:49,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:49,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:49,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91589187] [2024-06-14 11:56:49,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91589187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:49,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:49,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:56:49,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576363128] [2024-06-14 11:56:49,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:49,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:56:49,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:49,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:56:49,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:56:49,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:56:49,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 104 transitions, 844 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:49,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:49,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:56:49,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:50,362 INFO L124 PetriNetUnfolderBase]: 2195/3369 cut-off events. [2024-06-14 11:56:50,363 INFO L125 PetriNetUnfolderBase]: For 61437/61437 co-relation queries the response was YES. [2024-06-14 11:56:50,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18447 conditions, 3369 events. 2195/3369 cut-off events. For 61437/61437 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16909 event pairs, 712 based on Foata normal form. 4/3370 useless extension candidates. Maximal degree in co-relation 18404. Up to 3095 conditions per place. [2024-06-14 11:56:50,394 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 103 selfloop transitions, 27 changer transitions 0/136 dead transitions. [2024-06-14 11:56:50,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 136 transitions, 1322 flow [2024-06-14 11:56:50,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:56:50,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:56:50,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-14 11:56:50,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-06-14 11:56:50,396 INFO L175 Difference]: Start difference. First operand has 94 places, 104 transitions, 844 flow. Second operand 8 states and 157 transitions. [2024-06-14 11:56:50,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 136 transitions, 1322 flow [2024-06-14 11:56:50,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 136 transitions, 1253 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-14 11:56:50,430 INFO L231 Difference]: Finished difference. Result has 98 places, 110 transitions, 923 flow [2024-06-14 11:56:50,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=775, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=923, PETRI_PLACES=98, PETRI_TRANSITIONS=110} [2024-06-14 11:56:50,431 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 53 predicate places. [2024-06-14 11:56:50,431 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 110 transitions, 923 flow [2024-06-14 11:56:50,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:50,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:50,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:50,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 11:56:50,432 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:50,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:50,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1005992937, now seen corresponding path program 3 times [2024-06-14 11:56:50,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:50,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315937389] [2024-06-14 11:56:50,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:50,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:50,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:51,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:51,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:51,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315937389] [2024-06-14 11:56:51,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315937389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:51,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:51,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:56:51,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568103526] [2024-06-14 11:56:51,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:51,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:56:51,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:51,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:56:51,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:56:51,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:56:51,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 110 transitions, 923 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:51,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:51,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:56:51,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:51,801 INFO L124 PetriNetUnfolderBase]: 2217/3406 cut-off events. [2024-06-14 11:56:51,801 INFO L125 PetriNetUnfolderBase]: For 68459/68459 co-relation queries the response was YES. [2024-06-14 11:56:51,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19078 conditions, 3406 events. 2217/3406 cut-off events. For 68459/68459 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 17164 event pairs, 712 based on Foata normal form. 4/3407 useless extension candidates. Maximal degree in co-relation 19034. Up to 3183 conditions per place. [2024-06-14 11:56:51,822 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 112 selfloop transitions, 18 changer transitions 0/136 dead transitions. [2024-06-14 11:56:51,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 136 transitions, 1289 flow [2024-06-14 11:56:51,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:56:51,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:56:51,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 11:56:51,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-14 11:56:51,824 INFO L175 Difference]: Start difference. First operand has 98 places, 110 transitions, 923 flow. Second operand 8 states and 150 transitions. [2024-06-14 11:56:51,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 136 transitions, 1289 flow [2024-06-14 11:56:51,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 136 transitions, 1235 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 11:56:51,859 INFO L231 Difference]: Finished difference. Result has 102 places, 113 transitions, 965 flow [2024-06-14 11:56:51,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=869, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=965, PETRI_PLACES=102, PETRI_TRANSITIONS=113} [2024-06-14 11:56:51,860 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 57 predicate places. [2024-06-14 11:56:51,860 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 113 transitions, 965 flow [2024-06-14 11:56:51,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:51,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:51,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:51,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 11:56:51,861 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:51,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:51,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1006259847, now seen corresponding path program 4 times [2024-06-14 11:56:51,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:51,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781400755] [2024-06-14 11:56:51,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:51,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:51,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:52,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:52,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:52,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781400755] [2024-06-14 11:56:52,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781400755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:52,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:52,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:56:52,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491635138] [2024-06-14 11:56:52,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:52,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:56:52,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:52,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:56:52,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:56:52,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:56:52,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 113 transitions, 965 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:52,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:52,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:56:52,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:53,557 INFO L124 PetriNetUnfolderBase]: 2207/3392 cut-off events. [2024-06-14 11:56:53,557 INFO L125 PetriNetUnfolderBase]: For 72719/72719 co-relation queries the response was YES. [2024-06-14 11:56:53,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19111 conditions, 3392 events. 2207/3392 cut-off events. For 72719/72719 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17078 event pairs, 710 based on Foata normal form. 4/3393 useless extension candidates. Maximal degree in co-relation 19066. Up to 3142 conditions per place. [2024-06-14 11:56:53,588 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 108 selfloop transitions, 23 changer transitions 0/137 dead transitions. [2024-06-14 11:56:53,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 137 transitions, 1291 flow [2024-06-14 11:56:53,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:56:53,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:56:53,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 11:56:53,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-14 11:56:53,590 INFO L175 Difference]: Start difference. First operand has 102 places, 113 transitions, 965 flow. Second operand 8 states and 153 transitions. [2024-06-14 11:56:53,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 137 transitions, 1291 flow [2024-06-14 11:56:53,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 137 transitions, 1203 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-14 11:56:53,640 INFO L231 Difference]: Finished difference. Result has 104 places, 113 transitions, 931 flow [2024-06-14 11:56:53,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=877, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=931, PETRI_PLACES=104, PETRI_TRANSITIONS=113} [2024-06-14 11:56:53,641 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 59 predicate places. [2024-06-14 11:56:53,641 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 113 transitions, 931 flow [2024-06-14 11:56:53,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:53,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:53,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:53,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 11:56:53,642 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:53,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:53,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1006260064, now seen corresponding path program 3 times [2024-06-14 11:56:53,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:53,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504317395] [2024-06-14 11:56:53,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:53,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:53,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:54,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:54,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:54,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504317395] [2024-06-14 11:56:54,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504317395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:54,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:54,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:56:54,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300711447] [2024-06-14 11:56:54,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:54,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:56:54,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:54,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:56:54,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:56:54,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:56:54,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 113 transitions, 931 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:54,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:54,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:56:54,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:55,224 INFO L124 PetriNetUnfolderBase]: 2202/3386 cut-off events. [2024-06-14 11:56:55,225 INFO L125 PetriNetUnfolderBase]: For 77408/77411 co-relation queries the response was YES. [2024-06-14 11:56:55,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19242 conditions, 3386 events. 2202/3386 cut-off events. For 77408/77411 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17037 event pairs, 714 based on Foata normal form. 4/3386 useless extension candidates. Maximal degree in co-relation 19196. Up to 3171 conditions per place. [2024-06-14 11:56:55,250 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 108 selfloop transitions, 17 changer transitions 0/131 dead transitions. [2024-06-14 11:56:55,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 131 transitions, 1227 flow [2024-06-14 11:56:55,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:56:55,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:56:55,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-14 11:56:55,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 11:56:55,252 INFO L175 Difference]: Start difference. First operand has 104 places, 113 transitions, 931 flow. Second operand 7 states and 133 transitions. [2024-06-14 11:56:55,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 131 transitions, 1227 flow [2024-06-14 11:56:55,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 131 transitions, 1128 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-14 11:56:55,294 INFO L231 Difference]: Finished difference. Result has 103 places, 113 transitions, 874 flow [2024-06-14 11:56:55,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=832, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=874, PETRI_PLACES=103, PETRI_TRANSITIONS=113} [2024-06-14 11:56:55,295 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 58 predicate places. [2024-06-14 11:56:55,295 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 113 transitions, 874 flow [2024-06-14 11:56:55,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:55,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:55,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:55,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 11:56:55,296 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:55,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:55,296 INFO L85 PathProgramCache]: Analyzing trace with hash 957716127, now seen corresponding path program 1 times [2024-06-14 11:56:55,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:55,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274715393] [2024-06-14 11:56:55,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:55,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:55,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:56,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:56,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:56,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274715393] [2024-06-14 11:56:56,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274715393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:56,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:56,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:56:56,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920714837] [2024-06-14 11:56:56,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:56,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:56:56,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:56,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:56:56,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:56:56,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:56:56,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 113 transitions, 874 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:56,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:56,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:56:56,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:56,758 INFO L124 PetriNetUnfolderBase]: 2629/3935 cut-off events. [2024-06-14 11:56:56,759 INFO L125 PetriNetUnfolderBase]: For 94230/94230 co-relation queries the response was YES. [2024-06-14 11:56:56,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22111 conditions, 3935 events. 2629/3935 cut-off events. For 94230/94230 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 18789 event pairs, 916 based on Foata normal form. 3/3935 useless extension candidates. Maximal degree in co-relation 22065. Up to 3828 conditions per place. [2024-06-14 11:56:56,785 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 102 selfloop transitions, 13 changer transitions 0/126 dead transitions. [2024-06-14 11:56:56,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 126 transitions, 1156 flow [2024-06-14 11:56:56,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:56:56,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:56:56,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-14 11:56:56,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37337662337662336 [2024-06-14 11:56:56,801 INFO L175 Difference]: Start difference. First operand has 103 places, 113 transitions, 874 flow. Second operand 7 states and 115 transitions. [2024-06-14 11:56:56,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 126 transitions, 1156 flow [2024-06-14 11:56:56,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 126 transitions, 1088 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 11:56:56,890 INFO L231 Difference]: Finished difference. Result has 103 places, 116 transitions, 872 flow [2024-06-14 11:56:56,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=806, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=872, PETRI_PLACES=103, PETRI_TRANSITIONS=116} [2024-06-14 11:56:56,890 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 58 predicate places. [2024-06-14 11:56:56,891 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 116 transitions, 872 flow [2024-06-14 11:56:56,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:56,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:56,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:56,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 11:56:56,891 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:56,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:56,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1178918507, now seen corresponding path program 1 times [2024-06-14 11:56:56,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:56,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779182312] [2024-06-14 11:56:56,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:56,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:56,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:58,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:58,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:58,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779182312] [2024-06-14 11:56:58,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779182312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:58,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:58,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:56:58,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010241732] [2024-06-14 11:56:58,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:58,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:56:58,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:58,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:56:58,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:56:58,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:56:58,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 116 transitions, 872 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:58,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:58,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:56:58,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:58,747 INFO L124 PetriNetUnfolderBase]: 2101/3297 cut-off events. [2024-06-14 11:56:58,748 INFO L125 PetriNetUnfolderBase]: For 89222/89225 co-relation queries the response was YES. [2024-06-14 11:56:58,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19521 conditions, 3297 events. 2101/3297 cut-off events. For 89222/89225 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17092 event pairs, 488 based on Foata normal form. 6/3299 useless extension candidates. Maximal degree in co-relation 19474. Up to 2812 conditions per place. [2024-06-14 11:56:58,770 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 108 selfloop transitions, 30 changer transitions 0/152 dead transitions. [2024-06-14 11:56:58,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 152 transitions, 1384 flow [2024-06-14 11:56:58,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:56:58,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:56:58,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-14 11:56:58,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48011363636363635 [2024-06-14 11:56:58,772 INFO L175 Difference]: Start difference. First operand has 103 places, 116 transitions, 872 flow. Second operand 8 states and 169 transitions. [2024-06-14 11:56:58,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 152 transitions, 1384 flow [2024-06-14 11:56:58,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 152 transitions, 1340 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 11:56:58,825 INFO L231 Difference]: Finished difference. Result has 106 places, 120 transitions, 963 flow [2024-06-14 11:56:58,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=828, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=963, PETRI_PLACES=106, PETRI_TRANSITIONS=120} [2024-06-14 11:56:58,826 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 61 predicate places. [2024-06-14 11:56:58,826 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 120 transitions, 963 flow [2024-06-14 11:56:58,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:58,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:58,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:58,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 11:56:58,827 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:58,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:58,827 INFO L85 PathProgramCache]: Analyzing trace with hash 99845175, now seen corresponding path program 1 times [2024-06-14 11:56:58,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:58,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095517705] [2024-06-14 11:56:58,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:58,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:58,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:59,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:59,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:59,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095517705] [2024-06-14 11:56:59,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095517705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:59,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:59,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:56:59,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104639914] [2024-06-14 11:56:59,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:59,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:56:59,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:59,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:56:59,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:56:59,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:56:59,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 120 transitions, 963 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:59,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:59,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:56:59,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:00,703 INFO L124 PetriNetUnfolderBase]: 2226/3424 cut-off events. [2024-06-14 11:57:00,704 INFO L125 PetriNetUnfolderBase]: For 96343/96346 co-relation queries the response was YES. [2024-06-14 11:57:00,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20624 conditions, 3424 events. 2226/3424 cut-off events. For 96343/96346 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17289 event pairs, 662 based on Foata normal form. 2/3422 useless extension candidates. Maximal degree in co-relation 20576. Up to 3008 conditions per place. [2024-06-14 11:57:00,725 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 109 selfloop transitions, 49 changer transitions 0/164 dead transitions. [2024-06-14 11:57:00,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 164 transitions, 1543 flow [2024-06-14 11:57:00,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:57:00,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:57:00,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-14 11:57:00,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 11:57:00,727 INFO L175 Difference]: Start difference. First operand has 106 places, 120 transitions, 963 flow. Second operand 10 states and 200 transitions. [2024-06-14 11:57:00,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 164 transitions, 1543 flow [2024-06-14 11:57:00,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 164 transitions, 1478 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-14 11:57:00,773 INFO L231 Difference]: Finished difference. Result has 112 places, 126 transitions, 1083 flow [2024-06-14 11:57:00,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=898, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1083, PETRI_PLACES=112, PETRI_TRANSITIONS=126} [2024-06-14 11:57:00,773 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 67 predicate places. [2024-06-14 11:57:00,773 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 126 transitions, 1083 flow [2024-06-14 11:57:00,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:00,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:00,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:00,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 11:57:00,774 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:00,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:00,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1178858057, now seen corresponding path program 2 times [2024-06-14 11:57:00,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:00,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569385163] [2024-06-14 11:57:00,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:00,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:00,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:01,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:01,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:01,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569385163] [2024-06-14 11:57:01,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569385163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:01,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:01,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:57:01,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970588704] [2024-06-14 11:57:01,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:01,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:57:01,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:01,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:57:01,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:57:02,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:57:02,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 126 transitions, 1083 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:02,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:02,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:57:02,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:02,773 INFO L124 PetriNetUnfolderBase]: 2148/3366 cut-off events. [2024-06-14 11:57:02,773 INFO L125 PetriNetUnfolderBase]: For 105944/105947 co-relation queries the response was YES. [2024-06-14 11:57:02,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21015 conditions, 3366 events. 2148/3366 cut-off events. For 105944/105947 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17442 event pairs, 623 based on Foata normal form. 6/3368 useless extension candidates. Maximal degree in co-relation 20965. Up to 2944 conditions per place. [2024-06-14 11:57:02,803 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 115 selfloop transitions, 29 changer transitions 0/160 dead transitions. [2024-06-14 11:57:02,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 160 transitions, 1499 flow [2024-06-14 11:57:02,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:57:02,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:57:02,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-14 11:57:02,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715909090909091 [2024-06-14 11:57:02,805 INFO L175 Difference]: Start difference. First operand has 112 places, 126 transitions, 1083 flow. Second operand 8 states and 166 transitions. [2024-06-14 11:57:02,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 160 transitions, 1499 flow [2024-06-14 11:57:02,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 160 transitions, 1406 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 11:57:02,866 INFO L231 Difference]: Finished difference. Result has 114 places, 131 transitions, 1109 flow [2024-06-14 11:57:02,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=993, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1109, PETRI_PLACES=114, PETRI_TRANSITIONS=131} [2024-06-14 11:57:02,867 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 69 predicate places. [2024-06-14 11:57:02,867 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 131 transitions, 1109 flow [2024-06-14 11:57:02,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:02,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:02,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:02,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 11:57:02,868 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:02,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:02,868 INFO L85 PathProgramCache]: Analyzing trace with hash 102641561, now seen corresponding path program 3 times [2024-06-14 11:57:02,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:02,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984678126] [2024-06-14 11:57:02,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:02,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:02,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:04,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:04,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:04,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984678126] [2024-06-14 11:57:04,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984678126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:04,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:04,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:57:04,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948891554] [2024-06-14 11:57:04,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:04,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:57:04,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:04,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:57:04,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:57:04,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:57:04,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 131 transitions, 1109 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:04,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:04,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:57:04,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:04,830 INFO L124 PetriNetUnfolderBase]: 2141/3353 cut-off events. [2024-06-14 11:57:04,831 INFO L125 PetriNetUnfolderBase]: For 112528/112531 co-relation queries the response was YES. [2024-06-14 11:57:04,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21212 conditions, 3353 events. 2141/3353 cut-off events. For 112528/112531 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17367 event pairs, 622 based on Foata normal form. 6/3355 useless extension candidates. Maximal degree in co-relation 21160. Up to 2966 conditions per place. [2024-06-14 11:57:04,853 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 116 selfloop transitions, 25 changer transitions 0/157 dead transitions. [2024-06-14 11:57:04,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 157 transitions, 1459 flow [2024-06-14 11:57:04,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:57:04,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:57:04,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-14 11:57:04,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630681818181818 [2024-06-14 11:57:04,855 INFO L175 Difference]: Start difference. First operand has 114 places, 131 transitions, 1109 flow. Second operand 8 states and 163 transitions. [2024-06-14 11:57:04,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 157 transitions, 1459 flow [2024-06-14 11:57:04,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 157 transitions, 1381 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-14 11:57:04,918 INFO L231 Difference]: Finished difference. Result has 118 places, 131 transitions, 1088 flow [2024-06-14 11:57:04,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1031, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1088, PETRI_PLACES=118, PETRI_TRANSITIONS=131} [2024-06-14 11:57:04,919 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 73 predicate places. [2024-06-14 11:57:04,919 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 131 transitions, 1088 flow [2024-06-14 11:57:04,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:04,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:04,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:04,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 11:57:04,920 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:04,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:04,920 INFO L85 PathProgramCache]: Analyzing trace with hash 2145408719, now seen corresponding path program 2 times [2024-06-14 11:57:04,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:04,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275564765] [2024-06-14 11:57:04,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:04,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:04,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:05,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:05,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:05,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275564765] [2024-06-14 11:57:05,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275564765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:05,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:05,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:57:05,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235836030] [2024-06-14 11:57:05,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:05,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:57:05,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:05,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:57:05,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:57:06,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:06,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 131 transitions, 1088 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:06,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:06,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:06,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:06,742 INFO L124 PetriNetUnfolderBase]: 2257/3469 cut-off events. [2024-06-14 11:57:06,742 INFO L125 PetriNetUnfolderBase]: For 119302/119305 co-relation queries the response was YES. [2024-06-14 11:57:06,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22015 conditions, 3469 events. 2257/3469 cut-off events. For 119302/119305 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17538 event pairs, 660 based on Foata normal form. 2/3467 useless extension candidates. Maximal degree in co-relation 21962. Up to 3079 conditions per place. [2024-06-14 11:57:06,767 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 112 selfloop transitions, 49 changer transitions 0/167 dead transitions. [2024-06-14 11:57:06,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 167 transitions, 1638 flow [2024-06-14 11:57:06,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:57:06,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:57:06,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-14 11:57:06,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48011363636363635 [2024-06-14 11:57:06,769 INFO L175 Difference]: Start difference. First operand has 118 places, 131 transitions, 1088 flow. Second operand 8 states and 169 transitions. [2024-06-14 11:57:06,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 167 transitions, 1638 flow [2024-06-14 11:57:06,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 167 transitions, 1560 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 11:57:06,832 INFO L231 Difference]: Finished difference. Result has 118 places, 134 transitions, 1150 flow [2024-06-14 11:57:06,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1010, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1150, PETRI_PLACES=118, PETRI_TRANSITIONS=134} [2024-06-14 11:57:06,832 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 73 predicate places. [2024-06-14 11:57:06,833 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 134 transitions, 1150 flow [2024-06-14 11:57:06,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:06,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:06,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:06,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 11:57:06,833 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:06,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:06,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1060585927, now seen corresponding path program 1 times [2024-06-14 11:57:06,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:06,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668462721] [2024-06-14 11:57:06,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:06,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:06,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:07,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:07,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:07,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668462721] [2024-06-14 11:57:07,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668462721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:07,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:07,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:57:07,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344518891] [2024-06-14 11:57:07,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:07,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:57:07,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:07,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:57:07,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:57:07,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:07,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 134 transitions, 1150 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:07,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:07,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:07,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:08,435 INFO L124 PetriNetUnfolderBase]: 2311/3552 cut-off events. [2024-06-14 11:57:08,436 INFO L125 PetriNetUnfolderBase]: For 130230/130233 co-relation queries the response was YES. [2024-06-14 11:57:08,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22873 conditions, 3552 events. 2311/3552 cut-off events. For 130230/130233 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17967 event pairs, 634 based on Foata normal form. 4/3552 useless extension candidates. Maximal degree in co-relation 22819. Up to 3006 conditions per place. [2024-06-14 11:57:08,461 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 111 selfloop transitions, 55 changer transitions 0/172 dead transitions. [2024-06-14 11:57:08,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 172 transitions, 1864 flow [2024-06-14 11:57:08,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:57:08,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:57:08,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-14 11:57:08,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-14 11:57:08,463 INFO L175 Difference]: Start difference. First operand has 118 places, 134 transitions, 1150 flow. Second operand 8 states and 168 transitions. [2024-06-14 11:57:08,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 172 transitions, 1864 flow [2024-06-14 11:57:08,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 172 transitions, 1746 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 11:57:08,535 INFO L231 Difference]: Finished difference. Result has 120 places, 140 transitions, 1231 flow [2024-06-14 11:57:08,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1032, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1231, PETRI_PLACES=120, PETRI_TRANSITIONS=140} [2024-06-14 11:57:08,536 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 75 predicate places. [2024-06-14 11:57:08,537 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 140 transitions, 1231 flow [2024-06-14 11:57:08,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:08,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:08,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:08,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 11:57:08,537 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:08,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:08,538 INFO L85 PathProgramCache]: Analyzing trace with hash 218110671, now seen corresponding path program 2 times [2024-06-14 11:57:08,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:08,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832244408] [2024-06-14 11:57:08,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:08,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:08,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:09,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:09,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:09,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832244408] [2024-06-14 11:57:09,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832244408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:09,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:09,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:57:09,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920960657] [2024-06-14 11:57:09,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:09,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:57:09,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:09,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:57:09,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:57:09,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:09,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 140 transitions, 1231 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:09,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:09,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:09,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:10,323 INFO L124 PetriNetUnfolderBase]: 2333/3589 cut-off events. [2024-06-14 11:57:10,324 INFO L125 PetriNetUnfolderBase]: For 139410/139413 co-relation queries the response was YES. [2024-06-14 11:57:10,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23426 conditions, 3589 events. 2333/3589 cut-off events. For 139410/139413 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 18260 event pairs, 634 based on Foata normal form. 4/3589 useless extension candidates. Maximal degree in co-relation 23371. Up to 3025 conditions per place. [2024-06-14 11:57:10,351 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 113 selfloop transitions, 57 changer transitions 0/176 dead transitions. [2024-06-14 11:57:10,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 176 transitions, 1931 flow [2024-06-14 11:57:10,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:57:10,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:57:10,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-14 11:57:10,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48295454545454547 [2024-06-14 11:57:10,353 INFO L175 Difference]: Start difference. First operand has 120 places, 140 transitions, 1231 flow. Second operand 8 states and 170 transitions. [2024-06-14 11:57:10,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 176 transitions, 1931 flow [2024-06-14 11:57:10,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 176 transitions, 1817 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-14 11:57:10,500 INFO L231 Difference]: Finished difference. Result has 124 places, 143 transitions, 1285 flow [2024-06-14 11:57:10,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1128, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1285, PETRI_PLACES=124, PETRI_TRANSITIONS=143} [2024-06-14 11:57:10,500 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 79 predicate places. [2024-06-14 11:57:10,500 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 143 transitions, 1285 flow [2024-06-14 11:57:10,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:10,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:10,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:10,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 11:57:10,501 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:10,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:10,502 INFO L85 PathProgramCache]: Analyzing trace with hash 217937505, now seen corresponding path program 3 times [2024-06-14 11:57:10,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:10,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324581208] [2024-06-14 11:57:10,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:10,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:10,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:11,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:11,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:11,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324581208] [2024-06-14 11:57:11,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324581208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:11,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:11,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:57:11,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864888420] [2024-06-14 11:57:11,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:11,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:57:11,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:11,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:57:11,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:57:11,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:11,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 143 transitions, 1285 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:11,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:11,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:11,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:12,327 INFO L124 PetriNetUnfolderBase]: 2344/3605 cut-off events. [2024-06-14 11:57:12,327 INFO L125 PetriNetUnfolderBase]: For 147618/147621 co-relation queries the response was YES. [2024-06-14 11:57:12,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23745 conditions, 3605 events. 2344/3605 cut-off events. For 147618/147621 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 18335 event pairs, 667 based on Foata normal form. 2/3603 useless extension candidates. Maximal degree in co-relation 23689. Up to 3250 conditions per place. [2024-06-14 11:57:12,353 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 125 selfloop transitions, 43 changer transitions 0/174 dead transitions. [2024-06-14 11:57:12,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 174 transitions, 1731 flow [2024-06-14 11:57:12,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:57:12,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:57:12,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-14 11:57:12,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4602272727272727 [2024-06-14 11:57:12,354 INFO L175 Difference]: Start difference. First operand has 124 places, 143 transitions, 1285 flow. Second operand 8 states and 162 transitions. [2024-06-14 11:57:12,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 174 transitions, 1731 flow [2024-06-14 11:57:12,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 174 transitions, 1621 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 11:57:12,441 INFO L231 Difference]: Finished difference. Result has 127 places, 146 transitions, 1309 flow [2024-06-14 11:57:12,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1175, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1309, PETRI_PLACES=127, PETRI_TRANSITIONS=146} [2024-06-14 11:57:12,442 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 82 predicate places. [2024-06-14 11:57:12,442 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 146 transitions, 1309 flow [2024-06-14 11:57:12,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:12,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:12,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:12,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 11:57:12,443 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:12,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:12,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1060765417, now seen corresponding path program 3 times [2024-06-14 11:57:12,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:12,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990187464] [2024-06-14 11:57:12,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:12,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:12,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:13,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:13,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:13,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990187464] [2024-06-14 11:57:13,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990187464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:13,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:13,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:57:13,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894394968] [2024-06-14 11:57:13,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:13,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:57:13,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:13,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:57:13,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:57:13,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:13,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 146 transitions, 1309 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:13,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:13,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:13,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:14,186 INFO L124 PetriNetUnfolderBase]: 2334/3591 cut-off events. [2024-06-14 11:57:14,186 INFO L125 PetriNetUnfolderBase]: For 155345/155348 co-relation queries the response was YES. [2024-06-14 11:57:14,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23763 conditions, 3591 events. 2334/3591 cut-off events. For 155345/155348 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 18265 event pairs, 625 based on Foata normal form. 4/3591 useless extension candidates. Maximal degree in co-relation 23706. Up to 3033 conditions per place. [2024-06-14 11:57:14,213 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 111 selfloop transitions, 62 changer transitions 0/179 dead transitions. [2024-06-14 11:57:14,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 179 transitions, 1867 flow [2024-06-14 11:57:14,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:57:14,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:57:14,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-14 11:57:14,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48295454545454547 [2024-06-14 11:57:14,215 INFO L175 Difference]: Start difference. First operand has 127 places, 146 transitions, 1309 flow. Second operand 8 states and 170 transitions. [2024-06-14 11:57:14,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 179 transitions, 1867 flow [2024-06-14 11:57:14,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 179 transitions, 1747 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 11:57:14,322 INFO L231 Difference]: Finished difference. Result has 129 places, 146 transitions, 1321 flow [2024-06-14 11:57:14,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1189, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1321, PETRI_PLACES=129, PETRI_TRANSITIONS=146} [2024-06-14 11:57:14,322 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 84 predicate places. [2024-06-14 11:57:14,322 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 146 transitions, 1321 flow [2024-06-14 11:57:14,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:14,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:14,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:14,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 11:57:14,323 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:14,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:14,323 INFO L85 PathProgramCache]: Analyzing trace with hash 218110485, now seen corresponding path program 4 times [2024-06-14 11:57:14,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:14,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360373313] [2024-06-14 11:57:14,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:14,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:14,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:15,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:15,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:15,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360373313] [2024-06-14 11:57:15,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360373313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:15,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:15,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:57:15,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998621752] [2024-06-14 11:57:15,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:15,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:57:15,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:15,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:57:15,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:57:15,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:15,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 146 transitions, 1321 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:15,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:15,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:15,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:15,946 INFO L124 PetriNetUnfolderBase]: 2345/3607 cut-off events. [2024-06-14 11:57:15,946 INFO L125 PetriNetUnfolderBase]: For 163953/163956 co-relation queries the response was YES. [2024-06-14 11:57:15,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24255 conditions, 3607 events. 2345/3607 cut-off events. For 163953/163956 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 18365 event pairs, 665 based on Foata normal form. 2/3605 useless extension candidates. Maximal degree in co-relation 24197. Up to 3252 conditions per place. [2024-06-14 11:57:15,974 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 128 selfloop transitions, 40 changer transitions 0/174 dead transitions. [2024-06-14 11:57:15,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 174 transitions, 1763 flow [2024-06-14 11:57:15,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:57:15,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:57:15,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-14 11:57:15,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-14 11:57:15,975 INFO L175 Difference]: Start difference. First operand has 129 places, 146 transitions, 1321 flow. Second operand 8 states and 158 transitions. [2024-06-14 11:57:15,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 174 transitions, 1763 flow [2024-06-14 11:57:16,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 174 transitions, 1585 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 11:57:16,067 INFO L231 Difference]: Finished difference. Result has 129 places, 149 transitions, 1277 flow [2024-06-14 11:57:16,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1143, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1277, PETRI_PLACES=129, PETRI_TRANSITIONS=149} [2024-06-14 11:57:16,068 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 84 predicate places. [2024-06-14 11:57:16,068 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 149 transitions, 1277 flow [2024-06-14 11:57:16,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:16,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:16,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:16,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 11:57:16,068 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:16,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:16,069 INFO L85 PathProgramCache]: Analyzing trace with hash -388918226, now seen corresponding path program 1 times [2024-06-14 11:57:16,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:16,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014996713] [2024-06-14 11:57:16,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:16,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:16,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:16,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:16,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:16,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014996713] [2024-06-14 11:57:16,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014996713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:16,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:16,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:57:16,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212170068] [2024-06-14 11:57:16,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:16,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:57:16,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:16,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:57:16,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:57:16,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:57:16,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 149 transitions, 1277 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:16,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:16,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:57:16,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:17,502 INFO L124 PetriNetUnfolderBase]: 2836/4241 cut-off events. [2024-06-14 11:57:17,503 INFO L125 PetriNetUnfolderBase]: For 196747/196747 co-relation queries the response was YES. [2024-06-14 11:57:17,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28113 conditions, 4241 events. 2836/4241 cut-off events. For 196747/196747 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 20500 event pairs, 867 based on Foata normal form. 1/4239 useless extension candidates. Maximal degree in co-relation 28054. Up to 4094 conditions per place. [2024-06-14 11:57:17,534 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 137 selfloop transitions, 18 changer transitions 0/171 dead transitions. [2024-06-14 11:57:17,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 171 transitions, 1778 flow [2024-06-14 11:57:17,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:57:17,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:57:17,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-14 11:57:17,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38961038961038963 [2024-06-14 11:57:17,536 INFO L175 Difference]: Start difference. First operand has 129 places, 149 transitions, 1277 flow. Second operand 7 states and 120 transitions. [2024-06-14 11:57:17,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 171 transitions, 1778 flow [2024-06-14 11:57:17,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 171 transitions, 1672 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 11:57:17,674 INFO L231 Difference]: Finished difference. Result has 131 places, 158 transitions, 1324 flow [2024-06-14 11:57:17,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1173, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1324, PETRI_PLACES=131, PETRI_TRANSITIONS=158} [2024-06-14 11:57:17,675 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 86 predicate places. [2024-06-14 11:57:17,675 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 158 transitions, 1324 flow [2024-06-14 11:57:17,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:17,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:17,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:17,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 11:57:17,676 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:17,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:17,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1129289485, now seen corresponding path program 5 times [2024-06-14 11:57:17,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:17,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830426357] [2024-06-14 11:57:17,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:17,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:17,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:18,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:18,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:18,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830426357] [2024-06-14 11:57:18,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830426357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:18,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:18,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:57:18,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574334551] [2024-06-14 11:57:18,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:18,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:57:18,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:18,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:57:18,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:57:18,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:18,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 158 transitions, 1324 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:18,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:18,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:18,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:19,301 INFO L124 PetriNetUnfolderBase]: 2380/3653 cut-off events. [2024-06-14 11:57:19,302 INFO L125 PetriNetUnfolderBase]: For 182905/182908 co-relation queries the response was YES. [2024-06-14 11:57:19,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25139 conditions, 3653 events. 2380/3653 cut-off events. For 182905/182908 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 18406 event pairs, 661 based on Foata normal form. 4/3653 useless extension candidates. Maximal degree in co-relation 25078. Up to 3413 conditions per place. [2024-06-14 11:57:19,330 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 152 selfloop transitions, 20 changer transitions 0/180 dead transitions. [2024-06-14 11:57:19,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 180 transitions, 1724 flow [2024-06-14 11:57:19,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:57:19,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:57:19,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 11:57:19,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-14 11:57:19,332 INFO L175 Difference]: Start difference. First operand has 131 places, 158 transitions, 1324 flow. Second operand 8 states and 150 transitions. [2024-06-14 11:57:19,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 180 transitions, 1724 flow [2024-06-14 11:57:19,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 180 transitions, 1669 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-14 11:57:19,429 INFO L231 Difference]: Finished difference. Result has 136 places, 158 transitions, 1317 flow [2024-06-14 11:57:19,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1269, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1317, PETRI_PLACES=136, PETRI_TRANSITIONS=158} [2024-06-14 11:57:19,430 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 91 predicate places. [2024-06-14 11:57:19,430 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 158 transitions, 1317 flow [2024-06-14 11:57:19,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:19,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:19,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:19,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 11:57:19,431 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:19,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:19,431 INFO L85 PathProgramCache]: Analyzing trace with hash -948693639, now seen corresponding path program 4 times [2024-06-14 11:57:19,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:19,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540716003] [2024-06-14 11:57:19,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:19,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:19,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:20,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:20,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:20,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540716003] [2024-06-14 11:57:20,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540716003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:20,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:20,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:57:20,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453967695] [2024-06-14 11:57:20,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:20,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:57:20,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:20,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:57:20,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:57:20,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:20,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 158 transitions, 1317 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:20,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:20,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:20,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:20,961 INFO L124 PetriNetUnfolderBase]: 2434/3736 cut-off events. [2024-06-14 11:57:20,962 INFO L125 PetriNetUnfolderBase]: For 197083/197086 co-relation queries the response was YES. [2024-06-14 11:57:20,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25979 conditions, 3736 events. 2434/3736 cut-off events. For 197083/197086 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 18941 event pairs, 663 based on Foata normal form. 6/3738 useless extension candidates. Maximal degree in co-relation 25916. Up to 3379 conditions per place. [2024-06-14 11:57:21,001 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 153 selfloop transitions, 32 changer transitions 0/193 dead transitions. [2024-06-14 11:57:21,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 193 transitions, 2109 flow [2024-06-14 11:57:21,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:57:21,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:57:21,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-14 11:57:21,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45738636363636365 [2024-06-14 11:57:21,003 INFO L175 Difference]: Start difference. First operand has 136 places, 158 transitions, 1317 flow. Second operand 8 states and 161 transitions. [2024-06-14 11:57:21,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 193 transitions, 2109 flow [2024-06-14 11:57:21,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 193 transitions, 2038 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 11:57:21,152 INFO L231 Difference]: Finished difference. Result has 137 places, 164 transitions, 1396 flow [2024-06-14 11:57:21,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1246, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1396, PETRI_PLACES=137, PETRI_TRANSITIONS=164} [2024-06-14 11:57:21,153 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 92 predicate places. [2024-06-14 11:57:21,153 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 164 transitions, 1396 flow [2024-06-14 11:57:21,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:21,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:21,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:21,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 11:57:21,154 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:21,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:21,155 INFO L85 PathProgramCache]: Analyzing trace with hash -940419429, now seen corresponding path program 5 times [2024-06-14 11:57:21,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:21,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426468777] [2024-06-14 11:57:21,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:21,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:21,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:22,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:22,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:22,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426468777] [2024-06-14 11:57:22,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426468777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:22,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:22,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:57:22,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003435780] [2024-06-14 11:57:22,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:22,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:57:22,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:22,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:57:22,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:57:22,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:22,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 164 transitions, 1396 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:22,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:22,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:22,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:22,880 INFO L124 PetriNetUnfolderBase]: 2424/3722 cut-off events. [2024-06-14 11:57:22,880 INFO L125 PetriNetUnfolderBase]: For 205479/205482 co-relation queries the response was YES. [2024-06-14 11:57:22,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26123 conditions, 3722 events. 2424/3722 cut-off events. For 205479/205482 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 18842 event pairs, 661 based on Foata normal form. 6/3724 useless extension candidates. Maximal degree in co-relation 26059. Up to 3454 conditions per place. [2024-06-14 11:57:22,908 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 160 selfloop transitions, 20 changer transitions 0/188 dead transitions. [2024-06-14 11:57:22,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 188 transitions, 1820 flow [2024-06-14 11:57:22,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:57:22,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:57:22,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 11:57:22,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 11:57:22,911 INFO L175 Difference]: Start difference. First operand has 137 places, 164 transitions, 1396 flow. Second operand 8 states and 152 transitions. [2024-06-14 11:57:22,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 188 transitions, 1820 flow [2024-06-14 11:57:23,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 188 transitions, 1697 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-14 11:57:23,022 INFO L231 Difference]: Finished difference. Result has 140 places, 164 transitions, 1321 flow [2024-06-14 11:57:23,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1273, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1321, PETRI_PLACES=140, PETRI_TRANSITIONS=164} [2024-06-14 11:57:23,023 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 95 predicate places. [2024-06-14 11:57:23,023 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 164 transitions, 1321 flow [2024-06-14 11:57:23,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:23,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:23,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:23,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 11:57:23,024 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:23,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:23,024 INFO L85 PathProgramCache]: Analyzing trace with hash 546809225, now seen corresponding path program 6 times [2024-06-14 11:57:23,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:23,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628117442] [2024-06-14 11:57:23,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:23,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:23,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:23,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:23,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:23,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628117442] [2024-06-14 11:57:23,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628117442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:23,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:23,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:57:23,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357874397] [2024-06-14 11:57:23,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:23,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:57:23,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:23,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:57:23,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:57:23,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:23,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 164 transitions, 1321 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:23,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:23,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:23,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:24,725 INFO L124 PetriNetUnfolderBase]: 2414/3708 cut-off events. [2024-06-14 11:57:24,725 INFO L125 PetriNetUnfolderBase]: For 212858/212861 co-relation queries the response was YES. [2024-06-14 11:57:24,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26034 conditions, 3708 events. 2414/3708 cut-off events. For 212858/212861 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 18777 event pairs, 654 based on Foata normal form. 6/3710 useless extension candidates. Maximal degree in co-relation 25969. Up to 3363 conditions per place. [2024-06-14 11:57:24,754 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 148 selfloop transitions, 33 changer transitions 0/189 dead transitions. [2024-06-14 11:57:24,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 189 transitions, 1751 flow [2024-06-14 11:57:24,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:57:24,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:57:24,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 11:57:24,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-14 11:57:24,756 INFO L175 Difference]: Start difference. First operand has 140 places, 164 transitions, 1321 flow. Second operand 8 states and 156 transitions. [2024-06-14 11:57:24,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 189 transitions, 1751 flow [2024-06-14 11:57:24,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 189 transitions, 1683 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 11:57:24,899 INFO L231 Difference]: Finished difference. Result has 141 places, 164 transitions, 1327 flow [2024-06-14 11:57:24,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1253, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1327, PETRI_PLACES=141, PETRI_TRANSITIONS=164} [2024-06-14 11:57:24,899 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 96 predicate places. [2024-06-14 11:57:24,899 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 164 transitions, 1327 flow [2024-06-14 11:57:24,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:24,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:24,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:24,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 11:57:24,900 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:24,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:24,900 INFO L85 PathProgramCache]: Analyzing trace with hash -375585746, now seen corresponding path program 2 times [2024-06-14 11:57:24,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:24,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372718983] [2024-06-14 11:57:24,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:24,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:24,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:25,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:25,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:25,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372718983] [2024-06-14 11:57:25,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372718983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:25,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:25,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:57:25,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481295280] [2024-06-14 11:57:25,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:25,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:57:25,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:25,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:57:25,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:57:25,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:57:25,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 164 transitions, 1327 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:25,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:25,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:57:25,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:26,360 INFO L124 PetriNetUnfolderBase]: 2879/4305 cut-off events. [2024-06-14 11:57:26,361 INFO L125 PetriNetUnfolderBase]: For 250432/250432 co-relation queries the response was YES. [2024-06-14 11:57:26,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29964 conditions, 4305 events. 2879/4305 cut-off events. For 250432/250432 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 20781 event pairs, 882 based on Foata normal form. 1/4303 useless extension candidates. Maximal degree in co-relation 29898. Up to 4175 conditions per place. [2024-06-14 11:57:26,393 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 144 selfloop transitions, 12 changer transitions 0/172 dead transitions. [2024-06-14 11:57:26,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 172 transitions, 1659 flow [2024-06-14 11:57:26,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:57:26,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:57:26,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-14 11:57:26,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39015151515151514 [2024-06-14 11:57:26,394 INFO L175 Difference]: Start difference. First operand has 141 places, 164 transitions, 1327 flow. Second operand 6 states and 103 transitions. [2024-06-14 11:57:26,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 172 transitions, 1659 flow [2024-06-14 11:57:26,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 172 transitions, 1537 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-14 11:57:26,579 INFO L231 Difference]: Finished difference. Result has 139 places, 164 transitions, 1235 flow [2024-06-14 11:57:26,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1205, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1235, PETRI_PLACES=139, PETRI_TRANSITIONS=164} [2024-06-14 11:57:26,580 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 94 predicate places. [2024-06-14 11:57:26,581 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 164 transitions, 1235 flow [2024-06-14 11:57:26,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:26,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:26,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:26,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 11:57:26,581 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:26,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:26,582 INFO L85 PathProgramCache]: Analyzing trace with hash -153776176, now seen corresponding path program 3 times [2024-06-14 11:57:26,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:26,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475551045] [2024-06-14 11:57:26,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:26,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:26,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:27,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:27,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:27,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475551045] [2024-06-14 11:57:27,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475551045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:27,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:27,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:57:27,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015962323] [2024-06-14 11:57:27,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:27,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:57:27,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:27,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:57:27,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:57:27,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:57:27,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 164 transitions, 1235 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:27,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:27,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:57:27,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:27,979 INFO L124 PetriNetUnfolderBase]: 2888/4319 cut-off events. [2024-06-14 11:57:27,980 INFO L125 PetriNetUnfolderBase]: For 261007/261007 co-relation queries the response was YES. [2024-06-14 11:57:28,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30019 conditions, 4319 events. 2888/4319 cut-off events. For 261007/261007 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 20883 event pairs, 882 based on Foata normal form. 1/4317 useless extension candidates. Maximal degree in co-relation 29952. Up to 4157 conditions per place. [2024-06-14 11:57:28,026 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 146 selfloop transitions, 31 changer transitions 0/193 dead transitions. [2024-06-14 11:57:28,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 193 transitions, 1736 flow [2024-06-14 11:57:28,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:57:28,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:57:28,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-14 11:57:28,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-14 11:57:28,028 INFO L175 Difference]: Start difference. First operand has 139 places, 164 transitions, 1235 flow. Second operand 7 states and 128 transitions. [2024-06-14 11:57:28,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 193 transitions, 1736 flow [2024-06-14 11:57:28,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 193 transitions, 1710 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 11:57:28,380 INFO L231 Difference]: Finished difference. Result has 144 places, 176 transitions, 1416 flow [2024-06-14 11:57:28,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1209, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1416, PETRI_PLACES=144, PETRI_TRANSITIONS=176} [2024-06-14 11:57:28,381 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 99 predicate places. [2024-06-14 11:57:28,381 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 176 transitions, 1416 flow [2024-06-14 11:57:28,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:28,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:28,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:28,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 11:57:28,382 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:28,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:28,382 INFO L85 PathProgramCache]: Analyzing trace with hash -383198354, now seen corresponding path program 1 times [2024-06-14 11:57:28,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:28,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986251487] [2024-06-14 11:57:28,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:28,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:28,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:29,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:29,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:29,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986251487] [2024-06-14 11:57:29,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986251487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:29,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:29,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:57:29,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924384427] [2024-06-14 11:57:29,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:29,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:57:29,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:29,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:57:29,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:57:29,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:57:29,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 176 transitions, 1416 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:29,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:29,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:57:29,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:29,962 INFO L124 PetriNetUnfolderBase]: 2893/4326 cut-off events. [2024-06-14 11:57:29,962 INFO L125 PetriNetUnfolderBase]: For 273164/273164 co-relation queries the response was YES. [2024-06-14 11:57:29,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30964 conditions, 4326 events. 2893/4326 cut-off events. For 273164/273164 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 20891 event pairs, 883 based on Foata normal form. 1/4324 useless extension candidates. Maximal degree in co-relation 30894. Up to 4182 conditions per place. [2024-06-14 11:57:30,000 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 160 selfloop transitions, 18 changer transitions 0/194 dead transitions. [2024-06-14 11:57:30,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 194 transitions, 1954 flow [2024-06-14 11:57:30,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:57:30,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:57:30,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-14 11:57:30,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-06-14 11:57:30,001 INFO L175 Difference]: Start difference. First operand has 144 places, 176 transitions, 1416 flow. Second operand 7 states and 119 transitions. [2024-06-14 11:57:30,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 194 transitions, 1954 flow [2024-06-14 11:57:30,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 194 transitions, 1894 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-14 11:57:30,168 INFO L231 Difference]: Finished difference. Result has 148 places, 182 transitions, 1472 flow [2024-06-14 11:57:30,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1356, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1472, PETRI_PLACES=148, PETRI_TRANSITIONS=182} [2024-06-14 11:57:30,169 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 103 predicate places. [2024-06-14 11:57:30,169 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 182 transitions, 1472 flow [2024-06-14 11:57:30,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:30,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:30,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:30,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 11:57:30,170 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:30,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:30,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1067878492, now seen corresponding path program 2 times [2024-06-14 11:57:30,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:30,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079832640] [2024-06-14 11:57:30,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:30,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:30,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:30,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:30,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:30,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079832640] [2024-06-14 11:57:30,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079832640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:30,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:30,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:57:30,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895305518] [2024-06-14 11:57:30,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:30,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:57:30,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:30,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:57:30,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:57:31,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:57:31,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 182 transitions, 1472 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:31,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:31,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:57:31,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:31,858 INFO L124 PetriNetUnfolderBase]: 2890/4323 cut-off events. [2024-06-14 11:57:31,859 INFO L125 PetriNetUnfolderBase]: For 286147/286150 co-relation queries the response was YES. [2024-06-14 11:57:31,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31554 conditions, 4323 events. 2890/4323 cut-off events. For 286147/286150 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 20942 event pairs, 886 based on Foata normal form. 3/4322 useless extension candidates. Maximal degree in co-relation 31483. Up to 4179 conditions per place. [2024-06-14 11:57:31,890 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 156 selfloop transitions, 18 changer transitions 0/190 dead transitions. [2024-06-14 11:57:31,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 190 transitions, 1842 flow [2024-06-14 11:57:31,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:57:31,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:57:31,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-14 11:57:31,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37337662337662336 [2024-06-14 11:57:31,891 INFO L175 Difference]: Start difference. First operand has 148 places, 182 transitions, 1472 flow. Second operand 7 states and 115 transitions. [2024-06-14 11:57:31,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 190 transitions, 1842 flow [2024-06-14 11:57:32,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 190 transitions, 1779 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-14 11:57:32,140 INFO L231 Difference]: Finished difference. Result has 152 places, 182 transitions, 1451 flow [2024-06-14 11:57:32,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1409, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1451, PETRI_PLACES=152, PETRI_TRANSITIONS=182} [2024-06-14 11:57:32,141 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 107 predicate places. [2024-06-14 11:57:32,141 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 182 transitions, 1451 flow [2024-06-14 11:57:32,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:32,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:32,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:32,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 11:57:32,142 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:32,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:32,142 INFO L85 PathProgramCache]: Analyzing trace with hash -940111599, now seen corresponding path program 1 times [2024-06-14 11:57:32,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:32,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511946954] [2024-06-14 11:57:32,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:32,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:32,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:33,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:33,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:33,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511946954] [2024-06-14 11:57:33,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511946954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:33,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:33,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:57:33,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932389881] [2024-06-14 11:57:33,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:33,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:57:33,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:33,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:57:33,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:57:33,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:57:33,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 182 transitions, 1451 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:33,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:33,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:57:33,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:34,438 INFO L124 PetriNetUnfolderBase]: 2822/4250 cut-off events. [2024-06-14 11:57:34,439 INFO L125 PetriNetUnfolderBase]: For 299198/299198 co-relation queries the response was YES. [2024-06-14 11:57:34,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31389 conditions, 4250 events. 2822/4250 cut-off events. For 299198/299198 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 20719 event pairs, 789 based on Foata normal form. 4/4251 useless extension candidates. Maximal degree in co-relation 31316. Up to 4024 conditions per place. [2024-06-14 11:57:34,481 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 181 selfloop transitions, 22 changer transitions 0/214 dead transitions. [2024-06-14 11:57:34,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 214 transitions, 1995 flow [2024-06-14 11:57:34,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:57:34,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:57:34,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 11:57:34,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4015151515151515 [2024-06-14 11:57:34,483 INFO L175 Difference]: Start difference. First operand has 152 places, 182 transitions, 1451 flow. Second operand 9 states and 159 transitions. [2024-06-14 11:57:34,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 214 transitions, 1995 flow [2024-06-14 11:57:34,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 214 transitions, 1942 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 11:57:34,719 INFO L231 Difference]: Finished difference. Result has 155 places, 187 transitions, 1517 flow [2024-06-14 11:57:34,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1398, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1517, PETRI_PLACES=155, PETRI_TRANSITIONS=187} [2024-06-14 11:57:34,720 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 110 predicate places. [2024-06-14 11:57:34,720 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 187 transitions, 1517 flow [2024-06-14 11:57:34,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:34,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:34,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:34,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 11:57:34,721 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:34,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:34,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1201643083, now seen corresponding path program 1 times [2024-06-14 11:57:34,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:34,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163080330] [2024-06-14 11:57:34,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:34,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:34,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:35,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:35,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:35,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163080330] [2024-06-14 11:57:35,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163080330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:35,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:35,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:57:35,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954349089] [2024-06-14 11:57:35,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:35,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:57:35,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:35,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:57:35,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:57:35,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:35,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 187 transitions, 1517 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:35,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:35,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:35,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:36,870 INFO L124 PetriNetUnfolderBase]: 2683/4101 cut-off events. [2024-06-14 11:57:36,870 INFO L125 PetriNetUnfolderBase]: For 307194/307197 co-relation queries the response was YES. [2024-06-14 11:57:36,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31234 conditions, 4101 events. 2683/4101 cut-off events. For 307194/307197 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 20713 event pairs, 590 based on Foata normal form. 4/4096 useless extension candidates. Maximal degree in co-relation 31160. Up to 3398 conditions per place. [2024-06-14 11:57:36,905 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 150 selfloop transitions, 65 changer transitions 0/228 dead transitions. [2024-06-14 11:57:36,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 228 transitions, 2289 flow [2024-06-14 11:57:36,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:57:36,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:57:36,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-14 11:57:36,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-14 11:57:36,907 INFO L175 Difference]: Start difference. First operand has 155 places, 187 transitions, 1517 flow. Second operand 9 states and 183 transitions. [2024-06-14 11:57:36,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 228 transitions, 2289 flow [2024-06-14 11:57:37,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 228 transitions, 2214 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-14 11:57:37,132 INFO L231 Difference]: Finished difference. Result has 158 places, 191 transitions, 1655 flow [2024-06-14 11:57:37,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1442, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1655, PETRI_PLACES=158, PETRI_TRANSITIONS=191} [2024-06-14 11:57:37,133 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 113 predicate places. [2024-06-14 11:57:37,133 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 191 transitions, 1655 flow [2024-06-14 11:57:37,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:37,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:37,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:37,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 11:57:37,134 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:37,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:37,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1976121419, now seen corresponding path program 2 times [2024-06-14 11:57:37,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:37,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542265728] [2024-06-14 11:57:37,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:37,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:37,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:38,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:38,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:38,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542265728] [2024-06-14 11:57:38,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542265728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:38,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:38,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:57:38,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748279922] [2024-06-14 11:57:38,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:38,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:57:38,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:38,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:57:38,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:57:38,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:38,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 191 transitions, 1655 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:38,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:38,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:38,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:39,317 INFO L124 PetriNetUnfolderBase]: 2737/4184 cut-off events. [2024-06-14 11:57:39,317 INFO L125 PetriNetUnfolderBase]: For 326144/326147 co-relation queries the response was YES. [2024-06-14 11:57:39,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32454 conditions, 4184 events. 2737/4184 cut-off events. For 326144/326147 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 21226 event pairs, 739 based on Foata normal form. 4/4179 useless extension candidates. Maximal degree in co-relation 32379. Up to 3615 conditions per place. [2024-06-14 11:57:39,359 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 156 selfloop transitions, 65 changer transitions 0/234 dead transitions. [2024-06-14 11:57:39,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 234 transitions, 2470 flow [2024-06-14 11:57:39,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:57:39,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:57:39,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-14 11:57:39,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-14 11:57:39,362 INFO L175 Difference]: Start difference. First operand has 158 places, 191 transitions, 1655 flow. Second operand 9 states and 183 transitions. [2024-06-14 11:57:39,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 234 transitions, 2470 flow [2024-06-14 11:57:39,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 234 transitions, 2330 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-14 11:57:39,651 INFO L231 Difference]: Finished difference. Result has 162 places, 198 transitions, 1757 flow [2024-06-14 11:57:39,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1542, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1757, PETRI_PLACES=162, PETRI_TRANSITIONS=198} [2024-06-14 11:57:39,652 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 117 predicate places. [2024-06-14 11:57:39,652 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 198 transitions, 1757 flow [2024-06-14 11:57:39,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:39,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:39,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:39,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 11:57:39,653 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:39,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:39,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1199765258, now seen corresponding path program 1 times [2024-06-14 11:57:39,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:39,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178388712] [2024-06-14 11:57:39,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:39,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:39,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:40,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:40,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:40,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178388712] [2024-06-14 11:57:40,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178388712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:40,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:40,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:57:40,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939389709] [2024-06-14 11:57:40,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:40,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:57:40,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:40,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:57:40,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:57:40,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:40,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 198 transitions, 1757 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:40,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:40,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:40,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:42,001 INFO L124 PetriNetUnfolderBase]: 2782/4247 cut-off events. [2024-06-14 11:57:42,002 INFO L125 PetriNetUnfolderBase]: For 343036/343043 co-relation queries the response was YES. [2024-06-14 11:57:42,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33215 conditions, 4247 events. 2782/4247 cut-off events. For 343036/343043 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 21507 event pairs, 690 based on Foata normal form. 4/4245 useless extension candidates. Maximal degree in co-relation 33138. Up to 3373 conditions per place. [2024-06-14 11:57:42,036 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 144 selfloop transitions, 97 changer transitions 0/254 dead transitions. [2024-06-14 11:57:42,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 254 transitions, 2651 flow [2024-06-14 11:57:42,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:57:42,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:57:42,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 242 transitions. [2024-06-14 11:57:42,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-14 11:57:42,038 INFO L175 Difference]: Start difference. First operand has 162 places, 198 transitions, 1757 flow. Second operand 12 states and 242 transitions. [2024-06-14 11:57:42,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 254 transitions, 2651 flow [2024-06-14 11:57:42,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 254 transitions, 2592 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-14 11:57:42,265 INFO L231 Difference]: Finished difference. Result has 171 places, 204 transitions, 1996 flow [2024-06-14 11:57:42,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1698, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1996, PETRI_PLACES=171, PETRI_TRANSITIONS=204} [2024-06-14 11:57:42,273 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 126 predicate places. [2024-06-14 11:57:42,274 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 204 transitions, 1996 flow [2024-06-14 11:57:42,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:42,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:42,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:42,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 11:57:42,274 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:42,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:42,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1199765413, now seen corresponding path program 3 times [2024-06-14 11:57:42,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:42,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365301408] [2024-06-14 11:57:42,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:42,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:42,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:43,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:43,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:43,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365301408] [2024-06-14 11:57:43,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365301408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:43,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:43,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:57:43,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655098178] [2024-06-14 11:57:43,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:43,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:57:43,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:43,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:57:43,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:57:43,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:43,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 204 transitions, 1996 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:43,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:43,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:43,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:44,870 INFO L124 PetriNetUnfolderBase]: 2791/4262 cut-off events. [2024-06-14 11:57:44,871 INFO L125 PetriNetUnfolderBase]: For 359319/359326 co-relation queries the response was YES. [2024-06-14 11:57:44,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34219 conditions, 4262 events. 2791/4262 cut-off events. For 359319/359326 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 21617 event pairs, 737 based on Foata normal form. 8/4259 useless extension candidates. Maximal degree in co-relation 34140. Up to 3721 conditions per place. [2024-06-14 11:57:44,989 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 162 selfloop transitions, 72 changer transitions 0/247 dead transitions. [2024-06-14 11:57:44,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 247 transitions, 2624 flow [2024-06-14 11:57:44,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:57:44,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:57:44,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-14 11:57:44,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44421487603305787 [2024-06-14 11:57:44,991 INFO L175 Difference]: Start difference. First operand has 171 places, 204 transitions, 1996 flow. Second operand 11 states and 215 transitions. [2024-06-14 11:57:44,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 247 transitions, 2624 flow [2024-06-14 11:57:45,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 247 transitions, 2459 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-14 11:57:45,297 INFO L231 Difference]: Finished difference. Result has 174 places, 206 transitions, 2021 flow [2024-06-14 11:57:45,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1831, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2021, PETRI_PLACES=174, PETRI_TRANSITIONS=206} [2024-06-14 11:57:45,298 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 129 predicate places. [2024-06-14 11:57:45,298 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 206 transitions, 2021 flow [2024-06-14 11:57:45,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:45,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:45,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:45,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 11:57:45,299 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:45,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:45,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1475858263, now seen corresponding path program 4 times [2024-06-14 11:57:45,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:45,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297059814] [2024-06-14 11:57:45,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:45,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:45,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:46,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:46,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:46,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297059814] [2024-06-14 11:57:46,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297059814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:46,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:46,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:57:46,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050862634] [2024-06-14 11:57:46,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:46,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:57:46,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:46,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:57:46,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:57:46,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:46,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 206 transitions, 2021 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:46,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:46,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:46,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:47,572 INFO L124 PetriNetUnfolderBase]: 2833/4328 cut-off events. [2024-06-14 11:57:47,572 INFO L125 PetriNetUnfolderBase]: For 374961/374968 co-relation queries the response was YES. [2024-06-14 11:57:47,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35169 conditions, 4328 events. 2833/4328 cut-off events. For 374961/374968 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 21997 event pairs, 593 based on Foata normal form. 4/4326 useless extension candidates. Maximal degree in co-relation 35088. Up to 3754 conditions per place. [2024-06-14 11:57:47,619 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 169 selfloop transitions, 66 changer transitions 0/248 dead transitions. [2024-06-14 11:57:47,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 248 transitions, 2853 flow [2024-06-14 11:57:47,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:57:47,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:57:47,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-14 11:57:47,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47474747474747475 [2024-06-14 11:57:47,621 INFO L175 Difference]: Start difference. First operand has 174 places, 206 transitions, 2021 flow. Second operand 9 states and 188 transitions. [2024-06-14 11:57:47,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 248 transitions, 2853 flow [2024-06-14 11:57:47,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 248 transitions, 2693 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-14 11:57:47,974 INFO L231 Difference]: Finished difference. Result has 174 places, 210 transitions, 2076 flow [2024-06-14 11:57:47,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1861, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2076, PETRI_PLACES=174, PETRI_TRANSITIONS=210} [2024-06-14 11:57:47,975 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 129 predicate places. [2024-06-14 11:57:47,975 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 210 transitions, 2076 flow [2024-06-14 11:57:47,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:47,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:47,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:47,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 11:57:47,976 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:47,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:47,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1834014629, now seen corresponding path program 5 times [2024-06-14 11:57:47,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:47,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423490675] [2024-06-14 11:57:47,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:47,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:47,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:49,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:49,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:49,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423490675] [2024-06-14 11:57:49,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423490675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:49,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:49,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:57:49,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859287210] [2024-06-14 11:57:49,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:49,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:57:49,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:49,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:57:49,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:57:49,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:49,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 210 transitions, 2076 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:49,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:49,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:49,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:50,406 INFO L124 PetriNetUnfolderBase]: 2850/4355 cut-off events. [2024-06-14 11:57:50,406 INFO L125 PetriNetUnfolderBase]: For 391015/391022 co-relation queries the response was YES. [2024-06-14 11:57:50,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35649 conditions, 4355 events. 2850/4355 cut-off events. For 391015/391022 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 22213 event pairs, 744 based on Foata normal form. 4/4353 useless extension candidates. Maximal degree in co-relation 35567. Up to 3868 conditions per place. [2024-06-14 11:57:50,459 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 175 selfloop transitions, 63 changer transitions 0/251 dead transitions. [2024-06-14 11:57:50,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 251 transitions, 2714 flow [2024-06-14 11:57:50,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:57:50,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:57:50,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 201 transitions. [2024-06-14 11:57:50,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45681818181818185 [2024-06-14 11:57:50,461 INFO L175 Difference]: Start difference. First operand has 174 places, 210 transitions, 2076 flow. Second operand 10 states and 201 transitions. [2024-06-14 11:57:50,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 251 transitions, 2714 flow [2024-06-14 11:57:50,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 251 transitions, 2600 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 11:57:50,942 INFO L231 Difference]: Finished difference. Result has 179 places, 212 transitions, 2140 flow [2024-06-14 11:57:50,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1966, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2140, PETRI_PLACES=179, PETRI_TRANSITIONS=212} [2024-06-14 11:57:50,943 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 134 predicate places. [2024-06-14 11:57:50,943 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 212 transitions, 2140 flow [2024-06-14 11:57:50,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:50,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:50,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:50,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 11:57:50,944 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:50,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:50,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1834014474, now seen corresponding path program 2 times [2024-06-14 11:57:50,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:50,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097359911] [2024-06-14 11:57:50,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:50,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:50,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:51,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:51,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:51,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097359911] [2024-06-14 11:57:51,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097359911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:51,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:51,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:57:51,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131698942] [2024-06-14 11:57:51,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:51,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:57:51,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:51,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:57:51,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:57:52,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:52,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 212 transitions, 2140 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:52,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:52,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:52,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:53,038 INFO L124 PetriNetUnfolderBase]: 2869/4393 cut-off events. [2024-06-14 11:57:53,039 INFO L125 PetriNetUnfolderBase]: For 406969/406972 co-relation queries the response was YES. [2024-06-14 11:57:53,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36274 conditions, 4393 events. 2869/4393 cut-off events. For 406969/406972 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 22595 event pairs, 690 based on Foata normal form. 4/4393 useless extension candidates. Maximal degree in co-relation 36190. Up to 3525 conditions per place. [2024-06-14 11:57:53,089 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 152 selfloop transitions, 103 changer transitions 0/268 dead transitions. [2024-06-14 11:57:53,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 268 transitions, 3528 flow [2024-06-14 11:57:53,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:57:53,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:57:53,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-14 11:57:53,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5025252525252525 [2024-06-14 11:57:53,091 INFO L175 Difference]: Start difference. First operand has 179 places, 212 transitions, 2140 flow. Second operand 9 states and 199 transitions. [2024-06-14 11:57:53,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 268 transitions, 3528 flow [2024-06-14 11:57:53,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 268 transitions, 3382 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-14 11:57:53,657 INFO L231 Difference]: Finished difference. Result has 183 places, 224 transitions, 2528 flow [2024-06-14 11:57:53,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1994, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2528, PETRI_PLACES=183, PETRI_TRANSITIONS=224} [2024-06-14 11:57:53,657 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 138 predicate places. [2024-06-14 11:57:53,657 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 224 transitions, 2528 flow [2024-06-14 11:57:53,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:53,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:53,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:53,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 11:57:53,658 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:53,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:53,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1944630437, now seen corresponding path program 6 times [2024-06-14 11:57:53,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:53,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262947366] [2024-06-14 11:57:53,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:53,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:53,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:54,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:54,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:54,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262947366] [2024-06-14 11:57:54,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262947366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:54,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:54,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:57:54,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342504975] [2024-06-14 11:57:54,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:54,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:57:54,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:54,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:57:54,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:57:55,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:55,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 224 transitions, 2528 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:55,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:55,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:55,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:55,945 INFO L124 PetriNetUnfolderBase]: 2861/4381 cut-off events. [2024-06-14 11:57:55,945 INFO L125 PetriNetUnfolderBase]: For 422332/422335 co-relation queries the response was YES. [2024-06-14 11:57:55,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37616 conditions, 4381 events. 2861/4381 cut-off events. For 422332/422335 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 22486 event pairs, 726 based on Foata normal form. 4/4376 useless extension candidates. Maximal degree in co-relation 37528. Up to 3886 conditions per place. [2024-06-14 11:57:55,995 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 191 selfloop transitions, 51 changer transitions 0/255 dead transitions. [2024-06-14 11:57:55,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 255 transitions, 3106 flow [2024-06-14 11:57:55,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:57:55,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:57:55,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-14 11:57:55,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494949494949495 [2024-06-14 11:57:55,996 INFO L175 Difference]: Start difference. First operand has 183 places, 224 transitions, 2528 flow. Second operand 9 states and 178 transitions. [2024-06-14 11:57:55,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 255 transitions, 3106 flow [2024-06-14 11:57:56,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 255 transitions, 3045 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-14 11:57:56,552 INFO L231 Difference]: Finished difference. Result has 189 places, 224 transitions, 2576 flow [2024-06-14 11:57:56,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2467, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2576, PETRI_PLACES=189, PETRI_TRANSITIONS=224} [2024-06-14 11:57:56,552 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 144 predicate places. [2024-06-14 11:57:56,553 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 224 transitions, 2576 flow [2024-06-14 11:57:56,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:56,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:56,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:56,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 11:57:56,553 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:56,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:56,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1833870324, now seen corresponding path program 3 times [2024-06-14 11:57:56,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:56,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082038716] [2024-06-14 11:57:56,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:56,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:56,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:57,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:57,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:57,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082038716] [2024-06-14 11:57:57,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082038716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:57,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:57,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:57:57,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893626332] [2024-06-14 11:57:57,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:57,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:57:57,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:57,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:57:57,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:57:57,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:57,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 224 transitions, 2576 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:57,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:57,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:57,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:58,681 INFO L124 PetriNetUnfolderBase]: 2915/4459 cut-off events. [2024-06-14 11:57:58,681 INFO L125 PetriNetUnfolderBase]: For 442456/442459 co-relation queries the response was YES. [2024-06-14 11:57:58,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38624 conditions, 4459 events. 2915/4459 cut-off events. For 442456/442459 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 23032 event pairs, 686 based on Foata normal form. 4/4459 useless extension candidates. Maximal degree in co-relation 38534. Up to 3720 conditions per place. [2024-06-14 11:57:58,743 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 168 selfloop transitions, 91 changer transitions 0/272 dead transitions. [2024-06-14 11:57:58,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 272 transitions, 3894 flow [2024-06-14 11:57:58,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:57:58,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:57:58,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-14 11:57:58,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.494949494949495 [2024-06-14 11:57:58,746 INFO L175 Difference]: Start difference. First operand has 189 places, 224 transitions, 2576 flow. Second operand 9 states and 196 transitions. [2024-06-14 11:57:58,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 272 transitions, 3894 flow [2024-06-14 11:57:59,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 272 transitions, 3626 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-14 11:57:59,284 INFO L231 Difference]: Finished difference. Result has 189 places, 230 transitions, 2606 flow [2024-06-14 11:57:59,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2308, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2606, PETRI_PLACES=189, PETRI_TRANSITIONS=230} [2024-06-14 11:57:59,285 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 144 predicate places. [2024-06-14 11:57:59,285 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 230 transitions, 2606 flow [2024-06-14 11:57:59,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:59,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:59,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:59,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 11:57:59,286 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:59,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:59,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1833864744, now seen corresponding path program 4 times [2024-06-14 11:57:59,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:59,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393579194] [2024-06-14 11:57:59,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:59,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:59,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:00,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:00,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:00,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393579194] [2024-06-14 11:58:00,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393579194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:00,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:00,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:58:00,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120656285] [2024-06-14 11:58:00,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:00,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:58:00,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:00,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:58:00,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:58:00,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:58:00,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 230 transitions, 2606 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:00,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:00,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:58:00,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:01,531 INFO L124 PetriNetUnfolderBase]: 2905/4445 cut-off events. [2024-06-14 11:58:01,531 INFO L125 PetriNetUnfolderBase]: For 454477/454480 co-relation queries the response was YES. [2024-06-14 11:58:01,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38402 conditions, 4445 events. 2905/4445 cut-off events. For 454477/454480 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 22942 event pairs, 686 based on Foata normal form. 4/4445 useless extension candidates. Maximal degree in co-relation 38313. Up to 3772 conditions per place. [2024-06-14 11:58:01,576 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 174 selfloop transitions, 78 changer transitions 0/265 dead transitions. [2024-06-14 11:58:01,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 265 transitions, 3222 flow [2024-06-14 11:58:01,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:58:01,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:58:01,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-14 11:58:01,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-14 11:58:01,578 INFO L175 Difference]: Start difference. First operand has 189 places, 230 transitions, 2606 flow. Second operand 9 states and 186 transitions. [2024-06-14 11:58:01,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 265 transitions, 3222 flow [2024-06-14 11:58:02,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 265 transitions, 3058 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-14 11:58:02,052 INFO L231 Difference]: Finished difference. Result has 193 places, 230 transitions, 2606 flow [2024-06-14 11:58:02,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2442, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2606, PETRI_PLACES=193, PETRI_TRANSITIONS=230} [2024-06-14 11:58:02,053 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 148 predicate places. [2024-06-14 11:58:02,053 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 230 transitions, 2606 flow [2024-06-14 11:58:02,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:02,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:02,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:02,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 11:58:02,053 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:02,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:02,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1828300554, now seen corresponding path program 5 times [2024-06-14 11:58:02,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:02,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615910845] [2024-06-14 11:58:02,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:02,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:02,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:03,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:03,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:03,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615910845] [2024-06-14 11:58:03,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615910845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:03,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:03,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:58:03,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411626188] [2024-06-14 11:58:03,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:03,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:58:03,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:03,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:58:03,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:58:03,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:58:03,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 230 transitions, 2606 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:03,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:03,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:58:03,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:04,281 INFO L124 PetriNetUnfolderBase]: 2927/4482 cut-off events. [2024-06-14 11:58:04,282 INFO L125 PetriNetUnfolderBase]: For 471144/471147 co-relation queries the response was YES. [2024-06-14 11:58:04,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39111 conditions, 4482 events. 2927/4482 cut-off events. For 471144/471147 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 23210 event pairs, 700 based on Foata normal form. 4/4482 useless extension candidates. Maximal degree in co-relation 39020. Up to 3771 conditions per place. [2024-06-14 11:58:04,330 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 177 selfloop transitions, 78 changer transitions 0/268 dead transitions. [2024-06-14 11:58:04,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 268 transitions, 3481 flow [2024-06-14 11:58:04,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:58:04,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:58:04,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-14 11:58:04,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4671717171717172 [2024-06-14 11:58:04,333 INFO L175 Difference]: Start difference. First operand has 193 places, 230 transitions, 2606 flow. Second operand 9 states and 185 transitions. [2024-06-14 11:58:04,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 268 transitions, 3481 flow [2024-06-14 11:58:04,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 268 transitions, 3315 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 11:58:04,782 INFO L231 Difference]: Finished difference. Result has 194 places, 233 transitions, 2667 flow [2024-06-14 11:58:04,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2440, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2667, PETRI_PLACES=194, PETRI_TRANSITIONS=233} [2024-06-14 11:58:04,783 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 149 predicate places. [2024-06-14 11:58:04,783 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 233 transitions, 2667 flow [2024-06-14 11:58:04,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:04,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:04,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:04,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 11:58:04,784 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:04,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:04,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1828508099, now seen corresponding path program 7 times [2024-06-14 11:58:04,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:04,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160352169] [2024-06-14 11:58:04,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:04,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:04,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:05,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:05,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:05,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160352169] [2024-06-14 11:58:05,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160352169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:05,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:05,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:58:05,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132905920] [2024-06-14 11:58:05,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:05,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:58:05,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:05,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:58:05,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:58:06,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:58:06,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 233 transitions, 2667 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:06,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:06,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:58:06,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:07,079 INFO L124 PetriNetUnfolderBase]: 2944/4509 cut-off events. [2024-06-14 11:58:07,079 INFO L125 PetriNetUnfolderBase]: For 489028/489031 co-relation queries the response was YES. [2024-06-14 11:58:07,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39609 conditions, 4509 events. 2944/4509 cut-off events. For 489028/489031 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 23390 event pairs, 741 based on Foata normal form. 4/4504 useless extension candidates. Maximal degree in co-relation 39517. Up to 4064 conditions per place. [2024-06-14 11:58:07,129 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 208 selfloop transitions, 44 changer transitions 0/265 dead transitions. [2024-06-14 11:58:07,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 265 transitions, 3299 flow [2024-06-14 11:58:07,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:58:07,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:58:07,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-14 11:58:07,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44191919191919193 [2024-06-14 11:58:07,131 INFO L175 Difference]: Start difference. First operand has 194 places, 233 transitions, 2667 flow. Second operand 9 states and 175 transitions. [2024-06-14 11:58:07,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 265 transitions, 3299 flow [2024-06-14 11:58:07,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 265 transitions, 3150 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-14 11:58:07,764 INFO L231 Difference]: Finished difference. Result has 197 places, 235 transitions, 2653 flow [2024-06-14 11:58:07,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2518, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2653, PETRI_PLACES=197, PETRI_TRANSITIONS=235} [2024-06-14 11:58:07,765 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 152 predicate places. [2024-06-14 11:58:07,765 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 235 transitions, 2653 flow [2024-06-14 11:58:07,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:07,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:07,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:07,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 11:58:07,766 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:07,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:07,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1828507944, now seen corresponding path program 6 times [2024-06-14 11:58:07,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:07,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034240802] [2024-06-14 11:58:07,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:07,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:07,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:08,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:08,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:08,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034240802] [2024-06-14 11:58:08,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034240802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:08,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:08,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:58:08,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071103696] [2024-06-14 11:58:08,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:08,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:58:08,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:08,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:58:08,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:58:08,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:58:08,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 235 transitions, 2653 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:08,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:08,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:58:08,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:09,813 INFO L124 PetriNetUnfolderBase]: 2998/4587 cut-off events. [2024-06-14 11:58:09,814 INFO L125 PetriNetUnfolderBase]: For 512347/512350 co-relation queries the response was YES. [2024-06-14 11:58:09,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40513 conditions, 4587 events. 2998/4587 cut-off events. For 512347/512350 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 23879 event pairs, 698 based on Foata normal form. 4/4587 useless extension candidates. Maximal degree in co-relation 40420. Up to 3820 conditions per place. [2024-06-14 11:58:09,860 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 181 selfloop transitions, 85 changer transitions 0/279 dead transitions. [2024-06-14 11:58:09,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 279 transitions, 3841 flow [2024-06-14 11:58:09,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:58:09,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:58:09,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-14 11:58:09,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797979797979798 [2024-06-14 11:58:09,862 INFO L175 Difference]: Start difference. First operand has 197 places, 235 transitions, 2653 flow. Second operand 9 states and 190 transitions. [2024-06-14 11:58:09,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 279 transitions, 3841 flow [2024-06-14 11:58:10,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 279 transitions, 3728 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-14 11:58:10,385 INFO L231 Difference]: Finished difference. Result has 199 places, 241 transitions, 2850 flow [2024-06-14 11:58:10,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2540, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2850, PETRI_PLACES=199, PETRI_TRANSITIONS=241} [2024-06-14 11:58:10,386 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 154 predicate places. [2024-06-14 11:58:10,386 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 241 transitions, 2850 flow [2024-06-14 11:58:10,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:10,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:10,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:10,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 11:58:10,386 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:10,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:10,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1828502364, now seen corresponding path program 7 times [2024-06-14 11:58:10,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:10,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413911322] [2024-06-14 11:58:10,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:10,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:10,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:11,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:11,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:11,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413911322] [2024-06-14 11:58:11,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413911322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:11,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:11,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:58:11,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352669526] [2024-06-14 11:58:11,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:11,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:58:11,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:11,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:58:11,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:58:11,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:58:11,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 241 transitions, 2850 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:11,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:11,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:58:11,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:12,803 INFO L124 PetriNetUnfolderBase]: 2988/4573 cut-off events. [2024-06-14 11:58:12,803 INFO L125 PetriNetUnfolderBase]: For 525254/525257 co-relation queries the response was YES. [2024-06-14 11:58:12,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40748 conditions, 4573 events. 2988/4573 cut-off events. For 525254/525257 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 23749 event pairs, 696 based on Foata normal form. 4/4573 useless extension candidates. Maximal degree in co-relation 40654. Up to 3895 conditions per place. [2024-06-14 11:58:12,860 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 192 selfloop transitions, 70 changer transitions 0/275 dead transitions. [2024-06-14 11:58:12,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 275 transitions, 3484 flow [2024-06-14 11:58:12,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:58:12,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:58:12,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-14 11:58:12,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46464646464646464 [2024-06-14 11:58:12,862 INFO L175 Difference]: Start difference. First operand has 199 places, 241 transitions, 2850 flow. Second operand 9 states and 184 transitions. [2024-06-14 11:58:12,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 275 transitions, 3484 flow [2024-06-14 11:58:13,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 275 transitions, 3324 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-14 11:58:13,539 INFO L231 Difference]: Finished difference. Result has 203 places, 241 transitions, 2838 flow [2024-06-14 11:58:13,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2690, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2838, PETRI_PLACES=203, PETRI_TRANSITIONS=241} [2024-06-14 11:58:13,540 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 158 predicate places. [2024-06-14 11:58:13,540 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 241 transitions, 2838 flow [2024-06-14 11:58:13,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:13,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:13,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:13,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 11:58:13,541 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:13,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:13,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1039443248, now seen corresponding path program 1 times [2024-06-14 11:58:13,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:13,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809834913] [2024-06-14 11:58:13,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:13,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:13,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:14,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:14,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:14,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809834913] [2024-06-14 11:58:14,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809834913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:14,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:14,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:58:14,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462871831] [2024-06-14 11:58:14,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:14,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:58:14,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:14,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:58:14,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:58:14,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:58:14,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 241 transitions, 2838 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:14,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:14,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:58:14,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:15,517 INFO L124 PetriNetUnfolderBase]: 3332/5000 cut-off events. [2024-06-14 11:58:15,518 INFO L125 PetriNetUnfolderBase]: For 556862/556865 co-relation queries the response was YES. [2024-06-14 11:58:15,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44320 conditions, 5000 events. 3332/5000 cut-off events. For 556862/556865 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 25068 event pairs, 896 based on Foata normal form. 4/5000 useless extension candidates. Maximal degree in co-relation 44224. Up to 4661 conditions per place. [2024-06-14 11:58:15,565 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 210 selfloop transitions, 44 changer transitions 0/280 dead transitions. [2024-06-14 11:58:15,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 280 transitions, 3911 flow [2024-06-14 11:58:15,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:58:15,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:58:15,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 11:58:15,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-14 11:58:15,566 INFO L175 Difference]: Start difference. First operand has 203 places, 241 transitions, 2838 flow. Second operand 8 states and 144 transitions. [2024-06-14 11:58:15,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 280 transitions, 3911 flow [2024-06-14 11:58:16,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 280 transitions, 3739 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-14 11:58:16,131 INFO L231 Difference]: Finished difference. Result has 205 places, 260 transitions, 3089 flow [2024-06-14 11:58:16,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2678, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3089, PETRI_PLACES=205, PETRI_TRANSITIONS=260} [2024-06-14 11:58:16,132 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 160 predicate places. [2024-06-14 11:58:16,132 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 260 transitions, 3089 flow [2024-06-14 11:58:16,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:16,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:16,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:16,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 11:58:16,133 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:16,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:16,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1664935472, now seen corresponding path program 2 times [2024-06-14 11:58:16,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:16,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217596409] [2024-06-14 11:58:16,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:16,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:16,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:16,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:16,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:16,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217596409] [2024-06-14 11:58:16,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217596409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:16,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:16,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:58:16,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53311401] [2024-06-14 11:58:16,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:16,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:58:16,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:16,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:58:16,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:58:17,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:58:17,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 260 transitions, 3089 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:17,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:17,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:58:17,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:17,960 INFO L124 PetriNetUnfolderBase]: 3372/5055 cut-off events. [2024-06-14 11:58:17,960 INFO L125 PetriNetUnfolderBase]: For 583664/583667 co-relation queries the response was YES. [2024-06-14 11:58:17,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45622 conditions, 5055 events. 3372/5055 cut-off events. For 583664/583667 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 25371 event pairs, 893 based on Foata normal form. 6/5057 useless extension candidates. Maximal degree in co-relation 45523. Up to 4624 conditions per place. [2024-06-14 11:58:18,013 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 206 selfloop transitions, 62 changer transitions 0/294 dead transitions. [2024-06-14 11:58:18,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 294 transitions, 4179 flow [2024-06-14 11:58:18,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:58:18,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:58:18,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-14 11:58:18,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 11:58:18,015 INFO L175 Difference]: Start difference. First operand has 205 places, 260 transitions, 3089 flow. Second operand 7 states and 132 transitions. [2024-06-14 11:58:18,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 294 transitions, 4179 flow [2024-06-14 11:58:18,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 294 transitions, 4088 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-14 11:58:18,729 INFO L231 Difference]: Finished difference. Result has 210 places, 276 transitions, 3427 flow [2024-06-14 11:58:18,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3012, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3427, PETRI_PLACES=210, PETRI_TRANSITIONS=276} [2024-06-14 11:58:18,729 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 165 predicate places. [2024-06-14 11:58:18,730 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 276 transitions, 3427 flow [2024-06-14 11:58:18,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:18,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:18,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:18,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 11:58:18,730 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:18,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:18,731 INFO L85 PathProgramCache]: Analyzing trace with hash 828438112, now seen corresponding path program 1 times [2024-06-14 11:58:18,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:18,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904913103] [2024-06-14 11:58:18,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:18,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:18,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:19,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:19,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:19,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904913103] [2024-06-14 11:58:19,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904913103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:19,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:19,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:58:19,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703828440] [2024-06-14 11:58:19,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:19,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:58:19,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:19,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:58:19,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:58:19,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:58:19,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 276 transitions, 3427 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:19,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:19,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:58:19,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:20,635 INFO L124 PetriNetUnfolderBase]: 3403/5096 cut-off events. [2024-06-14 11:58:20,635 INFO L125 PetriNetUnfolderBase]: For 609646/609646 co-relation queries the response was YES. [2024-06-14 11:58:20,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47233 conditions, 5096 events. 3403/5096 cut-off events. For 609646/609646 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 25519 event pairs, 886 based on Foata normal form. 3/5096 useless extension candidates. Maximal degree in co-relation 47131. Up to 4833 conditions per place. [2024-06-14 11:58:20,683 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 241 selfloop transitions, 37 changer transitions 0/304 dead transitions. [2024-06-14 11:58:20,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 304 transitions, 4257 flow [2024-06-14 11:58:20,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:58:20,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:58:20,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-14 11:58:20,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4253246753246753 [2024-06-14 11:58:20,702 INFO L175 Difference]: Start difference. First operand has 210 places, 276 transitions, 3427 flow. Second operand 7 states and 131 transitions. [2024-06-14 11:58:20,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 304 transitions, 4257 flow [2024-06-14 11:58:21,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 304 transitions, 4124 flow, removed 59 selfloop flow, removed 2 redundant places. [2024-06-14 11:58:21,490 INFO L231 Difference]: Finished difference. Result has 216 places, 285 transitions, 3503 flow [2024-06-14 11:58:21,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3294, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3503, PETRI_PLACES=216, PETRI_TRANSITIONS=285} [2024-06-14 11:58:21,492 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 171 predicate places. [2024-06-14 11:58:21,492 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 285 transitions, 3503 flow [2024-06-14 11:58:21,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:21,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:21,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:21,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 11:58:21,493 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:21,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:21,493 INFO L85 PathProgramCache]: Analyzing trace with hash -640876824, now seen corresponding path program 8 times [2024-06-14 11:58:21,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:21,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212583965] [2024-06-14 11:58:21,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:21,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:21,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:22,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:22,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:22,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212583965] [2024-06-14 11:58:22,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212583965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:22,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:22,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:58:22,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819601990] [2024-06-14 11:58:22,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:22,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:58:22,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:22,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:58:22,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:58:22,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:58:22,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 285 transitions, 3503 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:22,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:22,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:58:22,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:23,928 INFO L124 PetriNetUnfolderBase]: 3176/4840 cut-off events. [2024-06-14 11:58:23,929 INFO L125 PetriNetUnfolderBase]: For 622648/622651 co-relation queries the response was YES. [2024-06-14 11:58:23,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46286 conditions, 4840 events. 3176/4840 cut-off events. For 622648/622651 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 25268 event pairs, 762 based on Foata normal form. 8/4839 useless extension candidates. Maximal degree in co-relation 46181. Up to 4430 conditions per place. [2024-06-14 11:58:23,978 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 265 selfloop transitions, 36 changer transitions 0/321 dead transitions. [2024-06-14 11:58:23,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 321 transitions, 4712 flow [2024-06-14 11:58:23,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:58:23,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:58:23,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-14 11:58:23,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44191919191919193 [2024-06-14 11:58:23,980 INFO L175 Difference]: Start difference. First operand has 216 places, 285 transitions, 3503 flow. Second operand 9 states and 175 transitions. [2024-06-14 11:58:23,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 321 transitions, 4712 flow [2024-06-14 11:58:24,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 321 transitions, 4652 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-14 11:58:24,743 INFO L231 Difference]: Finished difference. Result has 223 places, 288 transitions, 3602 flow [2024-06-14 11:58:24,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3443, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3602, PETRI_PLACES=223, PETRI_TRANSITIONS=288} [2024-06-14 11:58:24,744 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 178 predicate places. [2024-06-14 11:58:24,744 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 288 transitions, 3602 flow [2024-06-14 11:58:24,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:24,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:24,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:24,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 11:58:24,745 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:24,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:24,746 INFO L85 PathProgramCache]: Analyzing trace with hash 921301336, now seen corresponding path program 1 times [2024-06-14 11:58:24,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:24,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998359449] [2024-06-14 11:58:24,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:24,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:24,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:26,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:26,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:26,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998359449] [2024-06-14 11:58:26,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998359449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:26,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:26,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:58:26,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220317972] [2024-06-14 11:58:26,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:26,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:58:26,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:26,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:58:26,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:58:26,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:58:26,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 288 transitions, 3602 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:26,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:26,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:58:26,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:27,483 INFO L124 PetriNetUnfolderBase]: 3446/5163 cut-off events. [2024-06-14 11:58:27,483 INFO L125 PetriNetUnfolderBase]: For 644898/644898 co-relation queries the response was YES. [2024-06-14 11:58:27,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48914 conditions, 5163 events. 3446/5163 cut-off events. For 644898/644898 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 25942 event pairs, 840 based on Foata normal form. 2/5162 useless extension candidates. Maximal degree in co-relation 48806. Up to 4895 conditions per place. [2024-06-14 11:58:27,536 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 274 selfloop transitions, 26 changer transitions 0/318 dead transitions. [2024-06-14 11:58:27,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 318 transitions, 4327 flow [2024-06-14 11:58:27,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:58:27,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:58:27,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-14 11:58:27,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40404040404040403 [2024-06-14 11:58:27,538 INFO L175 Difference]: Start difference. First operand has 223 places, 288 transitions, 3602 flow. Second operand 9 states and 160 transitions. [2024-06-14 11:58:27,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 318 transitions, 4327 flow [2024-06-14 11:58:28,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 318 transitions, 3983 flow, removed 66 selfloop flow, removed 9 redundant places. [2024-06-14 11:58:28,414 INFO L231 Difference]: Finished difference. Result has 223 places, 291 transitions, 3371 flow [2024-06-14 11:58:28,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3266, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3371, PETRI_PLACES=223, PETRI_TRANSITIONS=291} [2024-06-14 11:58:28,415 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 178 predicate places. [2024-06-14 11:58:28,415 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 291 transitions, 3371 flow [2024-06-14 11:58:28,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:28,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:28,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:28,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 11:58:28,416 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:28,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:28,416 INFO L85 PathProgramCache]: Analyzing trace with hash -648026664, now seen corresponding path program 9 times [2024-06-14 11:58:28,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:28,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982335585] [2024-06-14 11:58:28,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:28,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:28,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:29,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:29,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:29,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982335585] [2024-06-14 11:58:29,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982335585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:29,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:29,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:58:29,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308669499] [2024-06-14 11:58:29,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:29,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:58:29,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:29,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:58:29,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:58:29,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:58:29,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 291 transitions, 3371 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:29,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:29,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:58:29,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:31,107 INFO L124 PetriNetUnfolderBase]: 3225/4913 cut-off events. [2024-06-14 11:58:31,107 INFO L125 PetriNetUnfolderBase]: For 655144/655151 co-relation queries the response was YES. [2024-06-14 11:58:31,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46943 conditions, 4913 events. 3225/4913 cut-off events. For 655144/655151 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 25751 event pairs, 709 based on Foata normal form. 6/4913 useless extension candidates. Maximal degree in co-relation 46835. Up to 4409 conditions per place. [2024-06-14 11:58:31,167 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 260 selfloop transitions, 46 changer transitions 0/326 dead transitions. [2024-06-14 11:58:31,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 326 transitions, 4384 flow [2024-06-14 11:58:31,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:58:31,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:58:31,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-14 11:58:31,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494949494949495 [2024-06-14 11:58:31,169 INFO L175 Difference]: Start difference. First operand has 223 places, 291 transitions, 3371 flow. Second operand 9 states and 178 transitions. [2024-06-14 11:58:31,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 326 transitions, 4384 flow [2024-06-14 11:58:31,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 326 transitions, 4328 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 11:58:31,926 INFO L231 Difference]: Finished difference. Result has 224 places, 294 transitions, 3496 flow [2024-06-14 11:58:31,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3315, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3496, PETRI_PLACES=224, PETRI_TRANSITIONS=294} [2024-06-14 11:58:31,926 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 179 predicate places. [2024-06-14 11:58:31,927 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 294 transitions, 3496 flow [2024-06-14 11:58:31,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:31,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:31,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:31,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 11:58:31,927 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:31,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:31,928 INFO L85 PathProgramCache]: Analyzing trace with hash 655067880, now seen corresponding path program 10 times [2024-06-14 11:58:31,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:31,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357616412] [2024-06-14 11:58:31,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:31,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:31,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:33,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:33,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:33,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357616412] [2024-06-14 11:58:33,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357616412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:33,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:33,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:58:33,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117896566] [2024-06-14 11:58:33,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:33,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:58:33,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:33,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:58:33,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:58:33,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:58:33,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 294 transitions, 3496 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:33,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:33,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:58:33,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:34,580 INFO L124 PetriNetUnfolderBase]: 3247/4950 cut-off events. [2024-06-14 11:58:34,580 INFO L125 PetriNetUnfolderBase]: For 677216/677223 co-relation queries the response was YES. [2024-06-14 11:58:34,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47746 conditions, 4950 events. 3247/4950 cut-off events. For 677216/677223 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 26029 event pairs, 704 based on Foata normal form. 6/4950 useless extension candidates. Maximal degree in co-relation 47637. Up to 4470 conditions per place. [2024-06-14 11:58:34,634 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 266 selfloop transitions, 41 changer transitions 0/327 dead transitions. [2024-06-14 11:58:34,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 327 transitions, 4285 flow [2024-06-14 11:58:34,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:58:34,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:58:34,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-14 11:58:34,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-14 11:58:34,636 INFO L175 Difference]: Start difference. First operand has 224 places, 294 transitions, 3496 flow. Second operand 9 states and 174 transitions. [2024-06-14 11:58:34,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 327 transitions, 4285 flow [2024-06-14 11:58:35,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 327 transitions, 4143 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-14 11:58:35,557 INFO L231 Difference]: Finished difference. Result has 226 places, 297 transitions, 3531 flow [2024-06-14 11:58:35,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3354, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3531, PETRI_PLACES=226, PETRI_TRANSITIONS=297} [2024-06-14 11:58:35,558 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 181 predicate places. [2024-06-14 11:58:35,558 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 297 transitions, 3531 flow [2024-06-14 11:58:35,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:35,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:35,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:35,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 11:58:35,559 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:35,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:35,560 INFO L85 PathProgramCache]: Analyzing trace with hash 655062145, now seen corresponding path program 8 times [2024-06-14 11:58:35,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:35,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642247239] [2024-06-14 11:58:35,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:35,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:35,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:36,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:36,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:36,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642247239] [2024-06-14 11:58:36,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642247239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:36,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:36,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:58:36,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157824958] [2024-06-14 11:58:36,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:36,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:58:36,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:36,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:58:36,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:58:36,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:58:36,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 297 transitions, 3531 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:36,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:36,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:58:36,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:38,012 INFO L124 PetriNetUnfolderBase]: 3239/4938 cut-off events. [2024-06-14 11:58:38,012 INFO L125 PetriNetUnfolderBase]: For 690171/690178 co-relation queries the response was YES. [2024-06-14 11:58:38,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47659 conditions, 4938 events. 3239/4938 cut-off events. For 690171/690178 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 25975 event pairs, 727 based on Foata normal form. 6/4938 useless extension candidates. Maximal degree in co-relation 47549. Up to 4600 conditions per place. [2024-06-14 11:58:38,111 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 282 selfloop transitions, 22 changer transitions 0/324 dead transitions. [2024-06-14 11:58:38,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 324 transitions, 4219 flow [2024-06-14 11:58:38,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:58:38,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:58:38,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 11:58:38,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217171717171717 [2024-06-14 11:58:38,113 INFO L175 Difference]: Start difference. First operand has 226 places, 297 transitions, 3531 flow. Second operand 9 states and 167 transitions. [2024-06-14 11:58:38,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 324 transitions, 4219 flow [2024-06-14 11:58:39,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 324 transitions, 4061 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-14 11:58:39,042 INFO L231 Difference]: Finished difference. Result has 228 places, 297 transitions, 3424 flow [2024-06-14 11:58:39,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3373, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3424, PETRI_PLACES=228, PETRI_TRANSITIONS=297} [2024-06-14 11:58:39,043 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 183 predicate places. [2024-06-14 11:58:39,043 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 297 transitions, 3424 flow [2024-06-14 11:58:39,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:39,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:39,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:39,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 11:58:39,044 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:39,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:39,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1599224210, now seen corresponding path program 11 times [2024-06-14 11:58:39,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:39,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172570465] [2024-06-14 11:58:39,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:39,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:39,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:40,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:40,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:40,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172570465] [2024-06-14 11:58:40,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172570465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:40,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:40,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:58:40,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375572147] [2024-06-14 11:58:40,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:40,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:58:40,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:40,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:58:40,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:58:40,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:58:40,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 297 transitions, 3424 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:40,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:40,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:58:40,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:41,443 INFO L124 PetriNetUnfolderBase]: 3229/4924 cut-off events. [2024-06-14 11:58:41,444 INFO L125 PetriNetUnfolderBase]: For 702458/702465 co-relation queries the response was YES. [2024-06-14 11:58:41,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47281 conditions, 4924 events. 3229/4924 cut-off events. For 702458/702465 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 25892 event pairs, 700 based on Foata normal form. 6/4924 useless extension candidates. Maximal degree in co-relation 47170. Up to 4317 conditions per place. [2024-06-14 11:58:41,500 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 246 selfloop transitions, 63 changer transitions 0/329 dead transitions. [2024-06-14 11:58:41,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 329 transitions, 4380 flow [2024-06-14 11:58:41,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:58:41,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:58:41,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-14 11:58:41,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494949494949495 [2024-06-14 11:58:41,516 INFO L175 Difference]: Start difference. First operand has 228 places, 297 transitions, 3424 flow. Second operand 9 states and 178 transitions. [2024-06-14 11:58:41,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 329 transitions, 4380 flow [2024-06-14 11:58:42,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 329 transitions, 4295 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-14 11:58:42,120 INFO L231 Difference]: Finished difference. Result has 229 places, 297 transitions, 3473 flow [2024-06-14 11:58:42,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3339, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3473, PETRI_PLACES=229, PETRI_TRANSITIONS=297} [2024-06-14 11:58:42,121 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 184 predicate places. [2024-06-14 11:58:42,121 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 297 transitions, 3473 flow [2024-06-14 11:58:42,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:42,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:42,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:42,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 11:58:42,122 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:42,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:42,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1242220222, now seen corresponding path program 2 times [2024-06-14 11:58:42,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:42,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33874056] [2024-06-14 11:58:42,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:42,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:42,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:43,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:43,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:43,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33874056] [2024-06-14 11:58:43,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33874056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:43,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:43,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:58:43,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931566894] [2024-06-14 11:58:43,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:43,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:58:43,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:43,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:58:43,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:58:43,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:58:43,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 297 transitions, 3473 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:43,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:43,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:58:43,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:44,390 INFO L124 PetriNetUnfolderBase]: 3505/5248 cut-off events. [2024-06-14 11:58:44,390 INFO L125 PetriNetUnfolderBase]: For 729142/729142 co-relation queries the response was YES. [2024-06-14 11:58:44,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49829 conditions, 5248 events. 3505/5248 cut-off events. For 729142/729142 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 26410 event pairs, 907 based on Foata normal form. 3/5248 useless extension candidates. Maximal degree in co-relation 49717. Up to 5042 conditions per place. [2024-06-14 11:58:44,462 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 269 selfloop transitions, 16 changer transitions 0/311 dead transitions. [2024-06-14 11:58:44,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 311 transitions, 4123 flow [2024-06-14 11:58:44,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:58:44,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:58:44,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 11:58:44,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-14 11:58:44,463 INFO L175 Difference]: Start difference. First operand has 229 places, 297 transitions, 3473 flow. Second operand 8 states and 128 transitions. [2024-06-14 11:58:44,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 311 transitions, 4123 flow [2024-06-14 11:58:45,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 311 transitions, 3761 flow, removed 24 selfloop flow, removed 10 redundant places. [2024-06-14 11:58:45,504 INFO L231 Difference]: Finished difference. Result has 227 places, 300 transitions, 3205 flow [2024-06-14 11:58:45,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3111, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3205, PETRI_PLACES=227, PETRI_TRANSITIONS=300} [2024-06-14 11:58:45,505 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 182 predicate places. [2024-06-14 11:58:45,505 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 300 transitions, 3205 flow [2024-06-14 11:58:45,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:45,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:45,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:45,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 11:58:45,506 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:45,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:45,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1027063088, now seen corresponding path program 3 times [2024-06-14 11:58:45,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:45,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861982745] [2024-06-14 11:58:45,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:45,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:45,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:46,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:46,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:46,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861982745] [2024-06-14 11:58:46,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861982745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:46,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:46,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:58:46,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436722021] [2024-06-14 11:58:46,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:46,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:58:46,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:46,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:58:46,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:58:46,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:58:46,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 300 transitions, 3205 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:46,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:46,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:58:46,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:47,543 INFO L124 PetriNetUnfolderBase]: 3501/5244 cut-off events. [2024-06-14 11:58:47,544 INFO L125 PetriNetUnfolderBase]: For 740906/740909 co-relation queries the response was YES. [2024-06-14 11:58:47,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48500 conditions, 5244 events. 3501/5244 cut-off events. For 740906/740909 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 26372 event pairs, 909 based on Foata normal form. 4/5244 useless extension candidates. Maximal degree in co-relation 48389. Up to 5012 conditions per place. [2024-06-14 11:58:47,601 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 258 selfloop transitions, 26 changer transitions 0/310 dead transitions. [2024-06-14 11:58:47,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 310 transitions, 3933 flow [2024-06-14 11:58:47,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:58:47,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:58:47,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-14 11:58:47,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3961038961038961 [2024-06-14 11:58:47,606 INFO L175 Difference]: Start difference. First operand has 227 places, 300 transitions, 3205 flow. Second operand 7 states and 122 transitions. [2024-06-14 11:58:47,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 310 transitions, 3933 flow [2024-06-14 11:58:48,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 310 transitions, 3838 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-14 11:58:48,783 INFO L231 Difference]: Finished difference. Result has 228 places, 300 transitions, 3170 flow [2024-06-14 11:58:48,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3110, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3170, PETRI_PLACES=228, PETRI_TRANSITIONS=300} [2024-06-14 11:58:48,799 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 183 predicate places. [2024-06-14 11:58:48,799 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 300 transitions, 3170 flow [2024-06-14 11:58:48,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:48,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:48,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:48,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 11:58:48,800 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:48,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:48,801 INFO L85 PathProgramCache]: Analyzing trace with hash 840460222, now seen corresponding path program 3 times [2024-06-14 11:58:48,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:48,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81496532] [2024-06-14 11:58:48,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:48,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:48,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:49,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:49,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:49,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81496532] [2024-06-14 11:58:49,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81496532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:49,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:49,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:58:49,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377008454] [2024-06-14 11:58:49,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:49,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:58:49,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:49,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:58:49,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:58:49,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:58:49,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 300 transitions, 3170 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:49,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:49,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:58:49,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:50,747 INFO L124 PetriNetUnfolderBase]: 3492/5231 cut-off events. [2024-06-14 11:58:50,748 INFO L125 PetriNetUnfolderBase]: For 756586/756586 co-relation queries the response was YES. [2024-06-14 11:58:50,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48415 conditions, 5231 events. 3492/5231 cut-off events. For 756586/756586 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 26330 event pairs, 903 based on Foata normal form. 3/5231 useless extension candidates. Maximal degree in co-relation 48304. Up to 5013 conditions per place. [2024-06-14 11:58:50,807 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 266 selfloop transitions, 21 changer transitions 0/313 dead transitions. [2024-06-14 11:58:50,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 313 transitions, 3780 flow [2024-06-14 11:58:50,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:58:50,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:58:50,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 11:58:50,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-14 11:58:50,808 INFO L175 Difference]: Start difference. First operand has 228 places, 300 transitions, 3170 flow. Second operand 8 states and 132 transitions. [2024-06-14 11:58:50,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 313 transitions, 3780 flow [2024-06-14 11:58:51,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 313 transitions, 3659 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-14 11:58:51,614 INFO L231 Difference]: Finished difference. Result has 231 places, 300 transitions, 3097 flow [2024-06-14 11:58:51,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3049, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3097, PETRI_PLACES=231, PETRI_TRANSITIONS=300} [2024-06-14 11:58:51,615 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 186 predicate places. [2024-06-14 11:58:51,615 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 300 transitions, 3097 flow [2024-06-14 11:58:51,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:51,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:51,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:51,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 11:58:51,616 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:51,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:51,617 INFO L85 PathProgramCache]: Analyzing trace with hash 440946362, now seen corresponding path program 4 times [2024-06-14 11:58:51,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:51,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457355860] [2024-06-14 11:58:51,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:51,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:51,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:52,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:52,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:52,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457355860] [2024-06-14 11:58:52,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457355860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:52,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:52,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:58:52,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039627342] [2024-06-14 11:58:52,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:52,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:58:52,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:52,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:58:52,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:58:52,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:58:52,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 300 transitions, 3097 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:52,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:52,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:58:52,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:53,550 INFO L124 PetriNetUnfolderBase]: 3553/5322 cut-off events. [2024-06-14 11:58:53,550 INFO L125 PetriNetUnfolderBase]: For 776817/776823 co-relation queries the response was YES. [2024-06-14 11:58:53,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49317 conditions, 5322 events. 3553/5322 cut-off events. For 776817/776823 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 26844 event pairs, 897 based on Foata normal form. 6/5324 useless extension candidates. Maximal degree in co-relation 49205. Up to 4858 conditions per place. [2024-06-14 11:58:53,630 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 231 selfloop transitions, 90 changer transitions 0/347 dead transitions. [2024-06-14 11:58:53,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 347 transitions, 4357 flow [2024-06-14 11:58:53,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:58:53,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:58:53,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 11:58:53,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-14 11:58:53,632 INFO L175 Difference]: Start difference. First operand has 231 places, 300 transitions, 3097 flow. Second operand 8 states and 156 transitions. [2024-06-14 11:58:53,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 347 transitions, 4357 flow [2024-06-14 11:58:54,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 347 transitions, 4277 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 11:58:54,558 INFO L231 Difference]: Finished difference. Result has 234 places, 322 transitions, 3541 flow [2024-06-14 11:58:54,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3017, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3541, PETRI_PLACES=234, PETRI_TRANSITIONS=322} [2024-06-14 11:58:54,559 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 189 predicate places. [2024-06-14 11:58:54,559 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 322 transitions, 3541 flow [2024-06-14 11:58:54,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:54,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:54,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:54,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 11:58:54,559 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:54,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:54,560 INFO L85 PathProgramCache]: Analyzing trace with hash -523221044, now seen corresponding path program 5 times [2024-06-14 11:58:54,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:54,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357208118] [2024-06-14 11:58:54,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:54,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:54,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:55,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:55,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:55,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357208118] [2024-06-14 11:58:55,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357208118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:55,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:55,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:58:55,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047437249] [2024-06-14 11:58:55,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:55,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:58:55,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:55,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:58:55,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:58:55,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:58:55,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 322 transitions, 3541 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:55,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:55,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:58:55,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:56,580 INFO L124 PetriNetUnfolderBase]: 3632/5438 cut-off events. [2024-06-14 11:58:56,581 INFO L125 PetriNetUnfolderBase]: For 800558/800565 co-relation queries the response was YES. [2024-06-14 11:58:56,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51283 conditions, 5438 events. 3632/5438 cut-off events. For 800558/800565 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 27565 event pairs, 906 based on Foata normal form. 6/5440 useless extension candidates. Maximal degree in co-relation 51168. Up to 4919 conditions per place. [2024-06-14 11:58:56,648 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 247 selfloop transitions, 104 changer transitions 0/377 dead transitions. [2024-06-14 11:58:56,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 377 transitions, 5063 flow [2024-06-14 11:58:56,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:58:56,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:58:56,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 11:58:56,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-14 11:58:56,650 INFO L175 Difference]: Start difference. First operand has 234 places, 322 transitions, 3541 flow. Second operand 8 states and 156 transitions. [2024-06-14 11:58:56,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 377 transitions, 5063 flow [2024-06-14 11:58:57,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 377 transitions, 4948 flow, removed 50 selfloop flow, removed 2 redundant places. [2024-06-14 11:58:57,698 INFO L231 Difference]: Finished difference. Result has 243 places, 352 transitions, 4220 flow [2024-06-14 11:58:57,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3456, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4220, PETRI_PLACES=243, PETRI_TRANSITIONS=352} [2024-06-14 11:58:57,700 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 198 predicate places. [2024-06-14 11:58:57,700 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 352 transitions, 4220 flow [2024-06-14 11:58:57,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:57,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:57,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:57,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 11:58:57,701 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:57,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:57,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1050658374, now seen corresponding path program 1 times [2024-06-14 11:58:57,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:57,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257622312] [2024-06-14 11:58:57,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:57,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:57,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:58,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:58,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:58,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257622312] [2024-06-14 11:58:58,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257622312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:58,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:58,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:58:58,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860395598] [2024-06-14 11:58:58,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:58,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:58:58,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:58,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:58:58,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:58:58,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 11:58:58,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 352 transitions, 4220 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:58,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:58,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 11:58:58,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:59,934 INFO L124 PetriNetUnfolderBase]: 3799/5607 cut-off events. [2024-06-14 11:58:59,935 INFO L125 PetriNetUnfolderBase]: For 821408/821408 co-relation queries the response was YES. [2024-06-14 11:58:59,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53355 conditions, 5607 events. 3799/5607 cut-off events. For 821408/821408 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 27696 event pairs, 927 based on Foata normal form. 1/5605 useless extension candidates. Maximal degree in co-relation 53235. Up to 5543 conditions per place. [2024-06-14 11:59:00,004 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 346 selfloop transitions, 25 changer transitions 0/374 dead transitions. [2024-06-14 11:59:00,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 374 transitions, 5242 flow [2024-06-14 11:59:00,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:59:00,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:59:00,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-14 11:59:00,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38961038961038963 [2024-06-14 11:59:00,006 INFO L175 Difference]: Start difference. First operand has 243 places, 352 transitions, 4220 flow. Second operand 7 states and 120 transitions. [2024-06-14 11:59:00,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 374 transitions, 5242 flow [2024-06-14 11:59:01,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 374 transitions, 5151 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-14 11:59:01,103 INFO L231 Difference]: Finished difference. Result has 247 places, 358 transitions, 4271 flow [2024-06-14 11:59:01,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4129, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4271, PETRI_PLACES=247, PETRI_TRANSITIONS=358} [2024-06-14 11:59:01,103 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 202 predicate places. [2024-06-14 11:59:01,104 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 358 transitions, 4271 flow [2024-06-14 11:59:01,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:01,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:01,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:01,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 11:59:01,104 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:01,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:01,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1005753896, now seen corresponding path program 2 times [2024-06-14 11:59:01,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:01,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515315631] [2024-06-14 11:59:01,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:01,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:01,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:01,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:01,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:01,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515315631] [2024-06-14 11:59:01,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515315631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:01,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:01,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:59:01,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132308093] [2024-06-14 11:59:01,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:01,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:59:01,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:01,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:59:01,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:59:01,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 11:59:01,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 358 transitions, 4271 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:01,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:01,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 11:59:01,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:03,261 INFO L124 PetriNetUnfolderBase]: 3804/5614 cut-off events. [2024-06-14 11:59:03,261 INFO L125 PetriNetUnfolderBase]: For 844798/844798 co-relation queries the response was YES. [2024-06-14 11:59:03,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53834 conditions, 5614 events. 3804/5614 cut-off events. For 844798/844798 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 27822 event pairs, 927 based on Foata normal form. 1/5612 useless extension candidates. Maximal degree in co-relation 53713. Up to 5549 conditions per place. [2024-06-14 11:59:03,330 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 344 selfloop transitions, 27 changer transitions 0/374 dead transitions. [2024-06-14 11:59:03,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 374 transitions, 5247 flow [2024-06-14 11:59:03,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:59:03,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:59:03,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-14 11:59:03,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38311688311688313 [2024-06-14 11:59:03,331 INFO L175 Difference]: Start difference. First operand has 247 places, 358 transitions, 4271 flow. Second operand 7 states and 118 transitions. [2024-06-14 11:59:03,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 374 transitions, 5247 flow [2024-06-14 11:59:04,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 374 transitions, 5174 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-14 11:59:04,282 INFO L231 Difference]: Finished difference. Result has 251 places, 361 transitions, 4304 flow [2024-06-14 11:59:04,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4208, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4304, PETRI_PLACES=251, PETRI_TRANSITIONS=361} [2024-06-14 11:59:04,283 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 206 predicate places. [2024-06-14 11:59:04,283 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 361 transitions, 4304 flow [2024-06-14 11:59:04,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:04,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:04,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:04,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 11:59:04,284 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:04,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:04,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1005754144, now seen corresponding path program 1 times [2024-06-14 11:59:04,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:04,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971201171] [2024-06-14 11:59:04,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:04,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:04,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:05,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:05,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:05,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971201171] [2024-06-14 11:59:05,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971201171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:05,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:05,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:59:05,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588163411] [2024-06-14 11:59:05,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:05,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:59:05,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:05,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:59:05,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:59:05,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:59:05,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 361 transitions, 4304 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:05,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:05,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:59:05,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:06,623 INFO L124 PetriNetUnfolderBase]: 3669/5485 cut-off events. [2024-06-14 11:59:06,624 INFO L125 PetriNetUnfolderBase]: For 871788/871788 co-relation queries the response was YES. [2024-06-14 11:59:06,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53380 conditions, 5485 events. 3669/5485 cut-off events. For 871788/871788 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 27641 event pairs, 919 based on Foata normal form. 3/5485 useless extension candidates. Maximal degree in co-relation 53257. Up to 5214 conditions per place. [2024-06-14 11:59:06,705 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 329 selfloop transitions, 27 changer transitions 0/385 dead transitions. [2024-06-14 11:59:06,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 385 transitions, 5304 flow [2024-06-14 11:59:06,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:59:06,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:59:06,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 11:59:06,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-06-14 11:59:06,706 INFO L175 Difference]: Start difference. First operand has 251 places, 361 transitions, 4304 flow. Second operand 8 states and 140 transitions. [2024-06-14 11:59:06,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 385 transitions, 5304 flow [2024-06-14 11:59:07,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 385 transitions, 5242 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 11:59:07,879 INFO L231 Difference]: Finished difference. Result has 255 places, 367 transitions, 4392 flow [2024-06-14 11:59:07,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4242, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4392, PETRI_PLACES=255, PETRI_TRANSITIONS=367} [2024-06-14 11:59:07,879 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 210 predicate places. [2024-06-14 11:59:07,880 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 367 transitions, 4392 flow [2024-06-14 11:59:07,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:07,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:07,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:07,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 11:59:07,880 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:07,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:07,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1507766948, now seen corresponding path program 2 times [2024-06-14 11:59:07,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:07,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705991912] [2024-06-14 11:59:07,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:07,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:07,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:08,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:08,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:08,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705991912] [2024-06-14 11:59:08,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705991912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:08,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:08,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:59:08,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700416654] [2024-06-14 11:59:08,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:08,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:59:08,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:08,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:59:08,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:59:08,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:59:08,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 367 transitions, 4392 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:08,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:08,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:59:08,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:10,217 INFO L124 PetriNetUnfolderBase]: 3684/5507 cut-off events. [2024-06-14 11:59:10,218 INFO L125 PetriNetUnfolderBase]: For 896176/896179 co-relation queries the response was YES. [2024-06-14 11:59:10,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54207 conditions, 5507 events. 3684/5507 cut-off events. For 896176/896179 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 27781 event pairs, 921 based on Foata normal form. 5/5508 useless extension candidates. Maximal degree in co-relation 54083. Up to 5228 conditions per place. [2024-06-14 11:59:10,292 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 324 selfloop transitions, 31 changer transitions 0/384 dead transitions. [2024-06-14 11:59:10,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 384 transitions, 5340 flow [2024-06-14 11:59:10,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:59:10,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:59:10,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 11:59:10,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3806818181818182 [2024-06-14 11:59:10,293 INFO L175 Difference]: Start difference. First operand has 255 places, 367 transitions, 4392 flow. Second operand 8 states and 134 transitions. [2024-06-14 11:59:10,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 384 transitions, 5340 flow [2024-06-14 11:59:11,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 384 transitions, 5281 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-14 11:59:11,356 INFO L231 Difference]: Finished difference. Result has 259 places, 370 transitions, 4450 flow [2024-06-14 11:59:11,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4335, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4450, PETRI_PLACES=259, PETRI_TRANSITIONS=370} [2024-06-14 11:59:11,357 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 214 predicate places. [2024-06-14 11:59:11,363 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 370 transitions, 4450 flow [2024-06-14 11:59:11,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:11,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:11,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:11,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 11:59:11,364 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:11,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:11,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1241929256, now seen corresponding path program 3 times [2024-06-14 11:59:11,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:11,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761902273] [2024-06-14 11:59:11,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:11,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:11,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:12,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:12,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:12,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761902273] [2024-06-14 11:59:12,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761902273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:12,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:12,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:59:12,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637541308] [2024-06-14 11:59:12,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:12,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:59:12,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:12,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:59:12,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:59:12,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 11:59:12,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 370 transitions, 4450 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:12,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:12,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 11:59:12,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:13,521 INFO L124 PetriNetUnfolderBase]: 3831/5653 cut-off events. [2024-06-14 11:59:13,521 INFO L125 PetriNetUnfolderBase]: For 910787/910790 co-relation queries the response was YES. [2024-06-14 11:59:13,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55334 conditions, 5653 events. 3831/5653 cut-off events. For 910787/910790 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 27991 event pairs, 935 based on Foata normal form. 1/5650 useless extension candidates. Maximal degree in co-relation 55208. Up to 5588 conditions per place. [2024-06-14 11:59:13,609 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 349 selfloop transitions, 27 changer transitions 0/379 dead transitions. [2024-06-14 11:59:13,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 379 transitions, 5230 flow [2024-06-14 11:59:13,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:59:13,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:59:13,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-14 11:59:13,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37012987012987014 [2024-06-14 11:59:13,611 INFO L175 Difference]: Start difference. First operand has 259 places, 370 transitions, 4450 flow. Second operand 7 states and 114 transitions. [2024-06-14 11:59:13,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 379 transitions, 5230 flow [2024-06-14 11:59:14,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 379 transitions, 5125 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-14 11:59:14,986 INFO L231 Difference]: Finished difference. Result has 261 places, 370 transitions, 4405 flow [2024-06-14 11:59:14,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4345, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4405, PETRI_PLACES=261, PETRI_TRANSITIONS=370} [2024-06-14 11:59:14,987 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 216 predicate places. [2024-06-14 11:59:14,987 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 370 transitions, 4405 flow [2024-06-14 11:59:14,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:14,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:14,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:14,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 11:59:14,988 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:14,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:14,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1241929504, now seen corresponding path program 3 times [2024-06-14 11:59:14,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:14,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63460781] [2024-06-14 11:59:14,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:14,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:14,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:15,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:15,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:15,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63460781] [2024-06-14 11:59:15,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63460781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:15,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:15,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:59:15,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417389584] [2024-06-14 11:59:15,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:15,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:59:15,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:15,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:59:15,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:59:15,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:59:15,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 370 transitions, 4405 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:15,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:15,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:59:15,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:17,212 INFO L124 PetriNetUnfolderBase]: 3672/5491 cut-off events. [2024-06-14 11:59:17,213 INFO L125 PetriNetUnfolderBase]: For 929143/929146 co-relation queries the response was YES. [2024-06-14 11:59:17,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54242 conditions, 5491 events. 3672/5491 cut-off events. For 929143/929146 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 27776 event pairs, 919 based on Foata normal form. 5/5492 useless extension candidates. Maximal degree in co-relation 54115. Up to 5218 conditions per place. [2024-06-14 11:59:17,318 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 326 selfloop transitions, 30 changer transitions 0/385 dead transitions. [2024-06-14 11:59:17,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 385 transitions, 5163 flow [2024-06-14 11:59:17,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:59:17,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:59:17,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 11:59:17,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-06-14 11:59:17,319 INFO L175 Difference]: Start difference. First operand has 261 places, 370 transitions, 4405 flow. Second operand 8 states and 136 transitions. [2024-06-14 11:59:17,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 385 transitions, 5163 flow [2024-06-14 11:59:18,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 385 transitions, 5059 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 11:59:18,979 INFO L231 Difference]: Finished difference. Result has 262 places, 370 transitions, 4367 flow [2024-06-14 11:59:18,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4301, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4367, PETRI_PLACES=262, PETRI_TRANSITIONS=370} [2024-06-14 11:59:18,979 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 217 predicate places. [2024-06-14 11:59:18,980 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 370 transitions, 4367 flow [2024-06-14 11:59:18,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:18,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:18,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:18,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 11:59:18,980 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:18,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:18,981 INFO L85 PathProgramCache]: Analyzing trace with hash 930731572, now seen corresponding path program 1 times [2024-06-14 11:59:18,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:18,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028625010] [2024-06-14 11:59:18,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:18,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:18,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:20,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:20,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:20,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028625010] [2024-06-14 11:59:20,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028625010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:20,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:20,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:59:20,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781541416] [2024-06-14 11:59:20,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:20,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:59:20,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:20,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:59:20,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:59:20,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:59:20,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 370 transitions, 4367 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:20,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:20,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:59:20,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:21,604 INFO L124 PetriNetUnfolderBase]: 3638/5548 cut-off events. [2024-06-14 11:59:21,604 INFO L125 PetriNetUnfolderBase]: For 1049607/1049614 co-relation queries the response was YES. [2024-06-14 11:59:21,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56926 conditions, 5548 events. 3638/5548 cut-off events. For 1049607/1049614 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 29810 event pairs, 494 based on Foata normal form. 16/5539 useless extension candidates. Maximal degree in co-relation 56798. Up to 3366 conditions per place. [2024-06-14 11:59:21,677 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 251 selfloop transitions, 143 changer transitions 0/424 dead transitions. [2024-06-14 11:59:21,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 424 transitions, 5727 flow [2024-06-14 11:59:21,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:59:21,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:59:21,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-14 11:59:21,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48409090909090907 [2024-06-14 11:59:21,679 INFO L175 Difference]: Start difference. First operand has 262 places, 370 transitions, 4367 flow. Second operand 10 states and 213 transitions. [2024-06-14 11:59:21,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 424 transitions, 5727 flow [2024-06-14 11:59:22,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 424 transitions, 5642 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 11:59:22,985 INFO L231 Difference]: Finished difference. Result has 264 places, 372 transitions, 4644 flow [2024-06-14 11:59:22,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4282, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4644, PETRI_PLACES=264, PETRI_TRANSITIONS=372} [2024-06-14 11:59:22,989 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 219 predicate places. [2024-06-14 11:59:22,989 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 372 transitions, 4644 flow [2024-06-14 11:59:22,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:22,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:22,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:22,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 11:59:22,990 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:22,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:22,990 INFO L85 PathProgramCache]: Analyzing trace with hash 988824022, now seen corresponding path program 2 times [2024-06-14 11:59:22,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:22,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943342288] [2024-06-14 11:59:22,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:22,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:22,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:24,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:24,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:24,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943342288] [2024-06-14 11:59:24,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943342288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:24,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:24,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:59:24,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656076936] [2024-06-14 11:59:24,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:24,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:59:24,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:24,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:59:24,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:59:24,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:59:24,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 372 transitions, 4644 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:24,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:24,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:59:24,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:25,945 INFO L124 PetriNetUnfolderBase]: 3851/5919 cut-off events. [2024-06-14 11:59:25,945 INFO L125 PetriNetUnfolderBase]: For 1143926/1143933 co-relation queries the response was YES. [2024-06-14 11:59:25,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62006 conditions, 5919 events. 3851/5919 cut-off events. For 1143926/1143933 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 32635 event pairs, 727 based on Foata normal form. 16/5916 useless extension candidates. Maximal degree in co-relation 61877. Up to 4159 conditions per place. [2024-06-14 11:59:26,027 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 249 selfloop transitions, 153 changer transitions 0/432 dead transitions. [2024-06-14 11:59:26,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 432 transitions, 6060 flow [2024-06-14 11:59:26,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:59:26,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:59:26,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-14 11:59:26,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48760330578512395 [2024-06-14 11:59:26,029 INFO L175 Difference]: Start difference. First operand has 264 places, 372 transitions, 4644 flow. Second operand 11 states and 236 transitions. [2024-06-14 11:59:26,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 432 transitions, 6060 flow [2024-06-14 11:59:27,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 432 transitions, 5877 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 11:59:27,716 INFO L231 Difference]: Finished difference. Result has 270 places, 375 transitions, 4887 flow [2024-06-14 11:59:27,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4461, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4887, PETRI_PLACES=270, PETRI_TRANSITIONS=375} [2024-06-14 11:59:27,717 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 225 predicate places. [2024-06-14 11:59:27,717 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 375 transitions, 4887 flow [2024-06-14 11:59:27,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:27,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:27,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:27,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 11:59:27,718 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:27,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:27,718 INFO L85 PathProgramCache]: Analyzing trace with hash 988939342, now seen corresponding path program 3 times [2024-06-14 11:59:27,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:27,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197381962] [2024-06-14 11:59:27,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:27,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:27,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:28,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:28,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:28,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197381962] [2024-06-14 11:59:28,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197381962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:28,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:28,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:59:28,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694334575] [2024-06-14 11:59:28,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:28,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:59:28,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:28,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:59:28,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:59:29,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:59:29,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 375 transitions, 4887 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:29,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:29,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:59:29,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:30,631 INFO L124 PetriNetUnfolderBase]: 3909/6017 cut-off events. [2024-06-14 11:59:30,632 INFO L125 PetriNetUnfolderBase]: For 1180646/1180653 co-relation queries the response was YES. [2024-06-14 11:59:30,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63747 conditions, 6017 events. 3909/6017 cut-off events. For 1180646/1180653 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 33419 event pairs, 743 based on Foata normal form. 16/6014 useless extension candidates. Maximal degree in co-relation 63615. Up to 4359 conditions per place. [2024-06-14 11:59:30,715 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 254 selfloop transitions, 152 changer transitions 0/436 dead transitions. [2024-06-14 11:59:30,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 436 transitions, 6274 flow [2024-06-14 11:59:30,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:59:30,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:59:30,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 251 transitions. [2024-06-14 11:59:30,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4753787878787879 [2024-06-14 11:59:30,740 INFO L175 Difference]: Start difference. First operand has 270 places, 375 transitions, 4887 flow. Second operand 12 states and 251 transitions. [2024-06-14 11:59:30,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 436 transitions, 6274 flow [2024-06-14 11:59:32,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 436 transitions, 6049 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-14 11:59:32,440 INFO L231 Difference]: Finished difference. Result has 275 places, 376 transitions, 5012 flow [2024-06-14 11:59:32,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4662, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5012, PETRI_PLACES=275, PETRI_TRANSITIONS=376} [2024-06-14 11:59:32,440 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 230 predicate places. [2024-06-14 11:59:32,441 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 376 transitions, 5012 flow [2024-06-14 11:59:32,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:32,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:32,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:32,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 11:59:32,441 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:32,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:32,442 INFO L85 PathProgramCache]: Analyzing trace with hash 988943992, now seen corresponding path program 4 times [2024-06-14 11:59:32,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:32,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380483125] [2024-06-14 11:59:32,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:32,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:32,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:33,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:33,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:33,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380483125] [2024-06-14 11:59:33,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380483125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:33,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:33,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:59:33,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665115611] [2024-06-14 11:59:33,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:33,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:59:33,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:33,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:59:33,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:59:34,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:59:34,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 376 transitions, 5012 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:34,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:34,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:59:34,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:35,893 INFO L124 PetriNetUnfolderBase]: 3857/5937 cut-off events. [2024-06-14 11:59:35,894 INFO L125 PetriNetUnfolderBase]: For 1167673/1167680 co-relation queries the response was YES. [2024-06-14 11:59:35,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61966 conditions, 5937 events. 3857/5937 cut-off events. For 1167673/1167680 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 32840 event pairs, 741 based on Foata normal form. 28/5946 useless extension candidates. Maximal degree in co-relation 61832. Up to 4479 conditions per place. [2024-06-14 11:59:35,964 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 254 selfloop transitions, 150 changer transitions 0/434 dead transitions. [2024-06-14 11:59:35,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 434 transitions, 6076 flow [2024-06-14 11:59:35,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 11:59:35,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 11:59:35,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 262 transitions. [2024-06-14 11:59:35,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.458041958041958 [2024-06-14 11:59:35,966 INFO L175 Difference]: Start difference. First operand has 275 places, 376 transitions, 5012 flow. Second operand 13 states and 262 transitions. [2024-06-14 11:59:35,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 434 transitions, 6076 flow [2024-06-14 11:59:37,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 434 transitions, 5726 flow, removed 22 selfloop flow, removed 10 redundant places. [2024-06-14 11:59:37,551 INFO L231 Difference]: Finished difference. Result has 278 places, 376 transitions, 4971 flow [2024-06-14 11:59:37,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4662, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4971, PETRI_PLACES=278, PETRI_TRANSITIONS=376} [2024-06-14 11:59:37,552 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 233 predicate places. [2024-06-14 11:59:37,552 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 376 transitions, 4971 flow [2024-06-14 11:59:37,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:37,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:37,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:37,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 11:59:37,553 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:37,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:37,553 INFO L85 PathProgramCache]: Analyzing trace with hash -95849523, now seen corresponding path program 1 times [2024-06-14 11:59:37,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:37,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427816276] [2024-06-14 11:59:37,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:37,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:37,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:38,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:38,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:38,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427816276] [2024-06-14 11:59:38,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427816276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:38,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:38,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:59:38,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99027740] [2024-06-14 11:59:38,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:38,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:59:38,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:38,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:59:38,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:59:38,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:59:38,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 376 transitions, 4971 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:38,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:38,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:59:38,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:40,031 INFO L124 PetriNetUnfolderBase]: 4179/6328 cut-off events. [2024-06-14 11:59:40,032 INFO L125 PetriNetUnfolderBase]: For 1151370/1151373 co-relation queries the response was YES. [2024-06-14 11:59:40,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64786 conditions, 6328 events. 4179/6328 cut-off events. For 1151370/1151373 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 33842 event pairs, 1028 based on Foata normal form. 8/6325 useless extension candidates. Maximal degree in co-relation 64651. Up to 5766 conditions per place. [2024-06-14 11:59:40,107 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 260 selfloop transitions, 128 changer transitions 0/417 dead transitions. [2024-06-14 11:59:40,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 417 transitions, 6545 flow [2024-06-14 11:59:40,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:59:40,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:59:40,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-14 11:59:40,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4383116883116883 [2024-06-14 11:59:40,109 INFO L175 Difference]: Start difference. First operand has 278 places, 376 transitions, 4971 flow. Second operand 7 states and 135 transitions. [2024-06-14 11:59:40,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 417 transitions, 6545 flow [2024-06-14 11:59:41,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 417 transitions, 6237 flow, removed 1 selfloop flow, removed 12 redundant places. [2024-06-14 11:59:41,637 INFO L231 Difference]: Finished difference. Result has 274 places, 397 transitions, 5387 flow [2024-06-14 11:59:41,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4663, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5387, PETRI_PLACES=274, PETRI_TRANSITIONS=397} [2024-06-14 11:59:41,638 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 229 predicate places. [2024-06-14 11:59:41,638 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 397 transitions, 5387 flow [2024-06-14 11:59:41,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:41,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:41,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:41,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 11:59:41,638 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:41,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:41,639 INFO L85 PathProgramCache]: Analyzing trace with hash -88230963, now seen corresponding path program 2 times [2024-06-14 11:59:41,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:41,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62128501] [2024-06-14 11:59:41,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:41,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:41,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:42,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:42,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:42,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62128501] [2024-06-14 11:59:42,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62128501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:42,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:42,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:59:42,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356722291] [2024-06-14 11:59:42,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:42,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:59:42,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:42,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:59:42,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:59:42,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:59:42,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 397 transitions, 5387 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:42,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:42,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:59:42,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:44,140 INFO L124 PetriNetUnfolderBase]: 4167/6314 cut-off events. [2024-06-14 11:59:44,141 INFO L125 PetriNetUnfolderBase]: For 1156153/1156156 co-relation queries the response was YES. [2024-06-14 11:59:44,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64281 conditions, 6314 events. 4167/6314 cut-off events. For 1156153/1156156 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 33829 event pairs, 1035 based on Foata normal form. 6/6309 useless extension candidates. Maximal degree in co-relation 64144. Up to 5871 conditions per place. [2024-06-14 11:59:44,235 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 298 selfloop transitions, 85 changer transitions 0/412 dead transitions. [2024-06-14 11:59:44,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 412 transitions, 6544 flow [2024-06-14 11:59:44,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:59:44,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:59:44,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 11:59:44,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-06-14 11:59:44,237 INFO L175 Difference]: Start difference. First operand has 274 places, 397 transitions, 5387 flow. Second operand 8 states and 140 transitions. [2024-06-14 11:59:44,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 412 transitions, 6544 flow [2024-06-14 11:59:46,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 412 transitions, 6276 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-14 11:59:46,260 INFO L231 Difference]: Finished difference. Result has 279 places, 398 transitions, 5362 flow [2024-06-14 11:59:46,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5119, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5362, PETRI_PLACES=279, PETRI_TRANSITIONS=398} [2024-06-14 11:59:46,260 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 234 predicate places. [2024-06-14 11:59:46,261 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 398 transitions, 5362 flow [2024-06-14 11:59:46,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:46,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:46,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:46,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 11:59:46,261 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:46,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:46,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1019992358, now seen corresponding path program 5 times [2024-06-14 11:59:46,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:46,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123208960] [2024-06-14 11:59:46,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:46,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:46,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:47,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:47,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:47,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123208960] [2024-06-14 11:59:47,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123208960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:47,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:47,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:59:47,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53580042] [2024-06-14 11:59:47,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:47,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:59:47,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:47,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:59:47,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:59:47,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:59:47,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 398 transitions, 5362 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:47,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:47,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:59:47,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:49,237 INFO L124 PetriNetUnfolderBase]: 4004/6192 cut-off events. [2024-06-14 11:59:49,237 INFO L125 PetriNetUnfolderBase]: For 1235483/1235494 co-relation queries the response was YES. [2024-06-14 11:59:49,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64507 conditions, 6192 events. 4004/6192 cut-off events. For 1235483/1235494 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 34814 event pairs, 643 based on Foata normal form. 18/6204 useless extension candidates. Maximal degree in co-relation 64368. Up to 4395 conditions per place. [2024-06-14 11:59:49,353 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 267 selfloop transitions, 149 changer transitions 0/452 dead transitions. [2024-06-14 11:59:49,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 452 transitions, 6766 flow [2024-06-14 11:59:49,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:59:49,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:59:49,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-14 11:59:49,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4954545454545455 [2024-06-14 11:59:49,354 INFO L175 Difference]: Start difference. First operand has 279 places, 398 transitions, 5362 flow. Second operand 10 states and 218 transitions. [2024-06-14 11:59:49,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 452 transitions, 6766 flow [2024-06-14 11:59:51,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 452 transitions, 6651 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-14 11:59:51,200 INFO L231 Difference]: Finished difference. Result has 285 places, 400 transitions, 5629 flow [2024-06-14 11:59:51,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5247, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5629, PETRI_PLACES=285, PETRI_TRANSITIONS=400} [2024-06-14 11:59:51,201 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 240 predicate places. [2024-06-14 11:59:51,201 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 400 transitions, 5629 flow [2024-06-14 11:59:51,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:51,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:51,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:51,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 11:59:51,202 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:51,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:51,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1019877038, now seen corresponding path program 6 times [2024-06-14 11:59:51,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:51,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661216914] [2024-06-14 11:59:51,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:51,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:51,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:52,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:52,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:52,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661216914] [2024-06-14 11:59:52,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661216914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:52,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:52,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:59:52,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147805642] [2024-06-14 11:59:52,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:52,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:59:52,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:52,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:59:52,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:59:52,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:59:52,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 400 transitions, 5629 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:52,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:52,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:59:52,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:54,379 INFO L124 PetriNetUnfolderBase]: 4212/6538 cut-off events. [2024-06-14 11:59:54,379 INFO L125 PetriNetUnfolderBase]: For 1339903/1339910 co-relation queries the response was YES. [2024-06-14 11:59:54,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69248 conditions, 6538 events. 4212/6538 cut-off events. For 1339903/1339910 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 37368 event pairs, 815 based on Foata normal form. 18/6552 useless extension candidates. Maximal degree in co-relation 69108. Up to 5019 conditions per place. [2024-06-14 11:59:54,489 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 276 selfloop transitions, 144 changer transitions 0/456 dead transitions. [2024-06-14 11:59:54,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 456 transitions, 7065 flow [2024-06-14 11:59:54,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:59:54,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:59:54,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-14 11:59:54,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4954545454545455 [2024-06-14 11:59:54,492 INFO L175 Difference]: Start difference. First operand has 285 places, 400 transitions, 5629 flow. Second operand 10 states and 218 transitions. [2024-06-14 11:59:54,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 456 transitions, 7065 flow [2024-06-14 11:59:56,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 456 transitions, 6833 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-14 11:59:56,420 INFO L231 Difference]: Finished difference. Result has 290 places, 404 transitions, 5797 flow [2024-06-14 11:59:56,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5409, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5797, PETRI_PLACES=290, PETRI_TRANSITIONS=404} [2024-06-14 11:59:56,421 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 245 predicate places. [2024-06-14 11:59:56,422 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 404 transitions, 5797 flow [2024-06-14 11:59:56,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:56,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:56,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:56,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 11:59:56,422 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:56,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:56,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1019872388, now seen corresponding path program 7 times [2024-06-14 11:59:56,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:56,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024586786] [2024-06-14 11:59:56,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:56,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:56,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:57,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:57,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:57,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024586786] [2024-06-14 11:59:57,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024586786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:57,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:57,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:59:57,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233990141] [2024-06-14 11:59:57,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:57,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:59:57,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:57,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:59:57,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:59:57,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:59:57,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 404 transitions, 5797 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:57,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:57,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:59:57,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:59,437 INFO L124 PetriNetUnfolderBase]: 4176/6482 cut-off events. [2024-06-14 11:59:59,437 INFO L125 PetriNetUnfolderBase]: For 1321596/1321603 co-relation queries the response was YES. [2024-06-14 11:59:59,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67989 conditions, 6482 events. 4176/6482 cut-off events. For 1321596/1321603 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 37019 event pairs, 817 based on Foata normal form. 22/6500 useless extension candidates. Maximal degree in co-relation 67846. Up to 5119 conditions per place. [2024-06-14 11:59:59,532 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 272 selfloop transitions, 142 changer transitions 0/450 dead transitions. [2024-06-14 11:59:59,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 450 transitions, 6815 flow [2024-06-14 11:59:59,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:59:59,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:59:59,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-14 11:59:59,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4818181818181818 [2024-06-14 11:59:59,534 INFO L175 Difference]: Start difference. First operand has 290 places, 404 transitions, 5797 flow. Second operand 10 states and 212 transitions. [2024-06-14 11:59:59,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 450 transitions, 6815 flow [2024-06-14 12:00:02,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 450 transitions, 6592 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 12:00:02,222 INFO L231 Difference]: Finished difference. Result has 294 places, 404 transitions, 5865 flow [2024-06-14 12:00:02,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5574, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5865, PETRI_PLACES=294, PETRI_TRANSITIONS=404} [2024-06-14 12:00:02,222 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 249 predicate places. [2024-06-14 12:00:02,223 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 404 transitions, 5865 flow [2024-06-14 12:00:02,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:02,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:02,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:02,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 12:00:02,223 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:00:02,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:02,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1488443870, now seen corresponding path program 8 times [2024-06-14 12:00:02,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:02,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955232220] [2024-06-14 12:00:02,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:02,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:02,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:03,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:03,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:03,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955232220] [2024-06-14 12:00:03,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955232220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:03,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:03,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:00:03,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018858765] [2024-06-14 12:00:03,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:03,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:00:03,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:03,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:00:03,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:00:03,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:00:03,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 404 transitions, 5865 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:03,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:03,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:00:03,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:05,570 INFO L124 PetriNetUnfolderBase]: 4229/6577 cut-off events. [2024-06-14 12:00:05,571 INFO L125 PetriNetUnfolderBase]: For 1339569/1339579 co-relation queries the response was YES. [2024-06-14 12:00:05,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68799 conditions, 6577 events. 4229/6577 cut-off events. For 1339569/1339579 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 37795 event pairs, 860 based on Foata normal form. 22/6593 useless extension candidates. Maximal degree in co-relation 68654. Up to 5448 conditions per place. [2024-06-14 12:00:05,683 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 294 selfloop transitions, 121 changer transitions 0/451 dead transitions. [2024-06-14 12:00:05,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 451 transitions, 7213 flow [2024-06-14 12:00:05,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:00:05,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:00:05,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-14 12:00:05,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4818181818181818 [2024-06-14 12:00:05,686 INFO L175 Difference]: Start difference. First operand has 294 places, 404 transitions, 5865 flow. Second operand 10 states and 212 transitions. [2024-06-14 12:00:05,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 451 transitions, 7213 flow [2024-06-14 12:00:08,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 451 transitions, 6930 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-14 12:00:08,945 INFO L231 Difference]: Finished difference. Result has 296 places, 405 transitions, 5869 flow [2024-06-14 12:00:08,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5582, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5869, PETRI_PLACES=296, PETRI_TRANSITIONS=405} [2024-06-14 12:00:08,946 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 251 predicate places. [2024-06-14 12:00:08,946 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 405 transitions, 5869 flow [2024-06-14 12:00:08,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:08,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:08,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:08,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 12:00:08,947 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:00:08,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:08,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1488448520, now seen corresponding path program 9 times [2024-06-14 12:00:08,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:08,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286967230] [2024-06-14 12:00:08,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:08,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:08,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:10,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:10,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:10,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286967230] [2024-06-14 12:00:10,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286967230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:10,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:10,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:00:10,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200078180] [2024-06-14 12:00:10,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:10,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:00:10,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:10,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:00:10,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:00:10,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:00:10,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 405 transitions, 5869 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:10,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:10,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:00:10,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:12,564 INFO L124 PetriNetUnfolderBase]: 4420/6896 cut-off events. [2024-06-14 12:00:12,564 INFO L125 PetriNetUnfolderBase]: For 1435599/1435606 co-relation queries the response was YES. [2024-06-14 12:00:12,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72752 conditions, 6896 events. 4420/6896 cut-off events. For 1435599/1435606 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 40318 event pairs, 865 based on Foata normal form. 18/6910 useless extension candidates. Maximal degree in co-relation 72606. Up to 5487 conditions per place. [2024-06-14 12:00:12,699 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 298 selfloop transitions, 124 changer transitions 0/458 dead transitions. [2024-06-14 12:00:12,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 458 transitions, 7595 flow [2024-06-14 12:00:12,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:00:12,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:00:12,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 216 transitions. [2024-06-14 12:00:12,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2024-06-14 12:00:12,702 INFO L175 Difference]: Start difference. First operand has 296 places, 405 transitions, 5869 flow. Second operand 10 states and 216 transitions. [2024-06-14 12:00:12,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 458 transitions, 7595 flow [2024-06-14 12:00:15,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 458 transitions, 7340 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-14 12:00:15,266 INFO L231 Difference]: Finished difference. Result has 298 places, 407 transitions, 5946 flow [2024-06-14 12:00:15,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5614, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5946, PETRI_PLACES=298, PETRI_TRANSITIONS=407} [2024-06-14 12:00:15,267 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 253 predicate places. [2024-06-14 12:00:15,267 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 407 transitions, 5946 flow [2024-06-14 12:00:15,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:15,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:15,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:15,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 12:00:15,268 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:00:15,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:15,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1315781000, now seen corresponding path program 10 times [2024-06-14 12:00:15,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:15,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477980504] [2024-06-14 12:00:15,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:15,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:15,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:16,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:16,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:16,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477980504] [2024-06-14 12:00:16,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477980504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:16,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:16,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:00:16,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323591322] [2024-06-14 12:00:16,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:16,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:00:16,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:16,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:00:16,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:00:16,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:00:16,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 407 transitions, 5946 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:16,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:16,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:00:16,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:18,925 INFO L124 PetriNetUnfolderBase]: 4478/6997 cut-off events. [2024-06-14 12:00:18,925 INFO L125 PetriNetUnfolderBase]: For 1469721/1469728 co-relation queries the response was YES. [2024-06-14 12:00:19,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73378 conditions, 6997 events. 4478/6997 cut-off events. For 1469721/1469728 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 41063 event pairs, 965 based on Foata normal form. 20/7011 useless extension candidates. Maximal degree in co-relation 73231. Up to 5879 conditions per place. [2024-06-14 12:00:19,076 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 313 selfloop transitions, 102 changer transitions 0/451 dead transitions. [2024-06-14 12:00:19,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 451 transitions, 7296 flow [2024-06-14 12:00:19,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:00:19,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:00:19,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-14 12:00:19,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-14 12:00:19,078 INFO L175 Difference]: Start difference. First operand has 298 places, 407 transitions, 5946 flow. Second operand 10 states and 205 transitions. [2024-06-14 12:00:19,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 451 transitions, 7296 flow [2024-06-14 12:00:21,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 451 transitions, 7100 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-14 12:00:21,661 INFO L231 Difference]: Finished difference. Result has 301 places, 408 transitions, 6003 flow [2024-06-14 12:00:21,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5750, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6003, PETRI_PLACES=301, PETRI_TRANSITIONS=408} [2024-06-14 12:00:21,662 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 256 predicate places. [2024-06-14 12:00:21,662 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 408 transitions, 6003 flow [2024-06-14 12:00:21,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:21,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:21,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:21,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 12:00:21,663 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:00:21,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:21,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1322214740, now seen corresponding path program 11 times [2024-06-14 12:00:21,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:21,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23368236] [2024-06-14 12:00:21,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:21,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:21,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:22,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:22,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:22,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23368236] [2024-06-14 12:00:22,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23368236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:22,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:22,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:00:22,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101176846] [2024-06-14 12:00:22,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:22,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:00:22,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:22,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:00:22,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:00:23,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:00:23,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 408 transitions, 6003 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:23,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:23,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:00:23,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:25,177 INFO L124 PetriNetUnfolderBase]: 4669/7316 cut-off events. [2024-06-14 12:00:25,178 INFO L125 PetriNetUnfolderBase]: For 1569407/1569410 co-relation queries the response was YES. [2024-06-14 12:00:25,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77696 conditions, 7316 events. 4669/7316 cut-off events. For 1569407/1569410 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 43687 event pairs, 970 based on Foata normal form. 16/7328 useless extension candidates. Maximal degree in co-relation 77548. Up to 5853 conditions per place. [2024-06-14 12:00:25,309 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 311 selfloop transitions, 112 changer transitions 0/459 dead transitions. [2024-06-14 12:00:25,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 459 transitions, 7749 flow [2024-06-14 12:00:25,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:00:25,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:00:25,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-14 12:00:25,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4818181818181818 [2024-06-14 12:00:25,311 INFO L175 Difference]: Start difference. First operand has 301 places, 408 transitions, 6003 flow. Second operand 10 states and 212 transitions. [2024-06-14 12:00:25,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 459 transitions, 7749 flow [2024-06-14 12:00:28,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 459 transitions, 7528 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-14 12:00:28,095 INFO L231 Difference]: Finished difference. Result has 303 places, 410 transitions, 6098 flow [2024-06-14 12:00:28,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5782, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6098, PETRI_PLACES=303, PETRI_TRANSITIONS=410} [2024-06-14 12:00:28,096 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 258 predicate places. [2024-06-14 12:00:28,096 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 410 transitions, 6098 flow [2024-06-14 12:00:28,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:28,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:28,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:28,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 12:00:28,097 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:00:28,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:28,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1488270890, now seen corresponding path program 12 times [2024-06-14 12:00:28,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:28,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877597928] [2024-06-14 12:00:28,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:28,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:28,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:29,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:29,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:29,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877597928] [2024-06-14 12:00:29,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877597928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:29,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:29,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:00:29,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018809868] [2024-06-14 12:00:29,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:29,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:00:29,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:29,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:00:29,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:00:29,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:00:29,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 410 transitions, 6098 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:29,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:29,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:00:29,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:31,944 INFO L124 PetriNetUnfolderBase]: 4628/7254 cut-off events. [2024-06-14 12:00:31,945 INFO L125 PetriNetUnfolderBase]: For 1553664/1553671 co-relation queries the response was YES. [2024-06-14 12:00:32,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76115 conditions, 7254 events. 4628/7254 cut-off events. For 1553664/1553671 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 43361 event pairs, 949 based on Foata normal form. 22/7272 useless extension candidates. Maximal degree in co-relation 75966. Up to 6138 conditions per place. [2024-06-14 12:00:32,060 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 303 selfloop transitions, 116 changer transitions 0/455 dead transitions. [2024-06-14 12:00:32,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 455 transitions, 7430 flow [2024-06-14 12:00:32,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:00:32,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:00:32,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-14 12:00:32,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-14 12:00:32,062 INFO L175 Difference]: Start difference. First operand has 303 places, 410 transitions, 6098 flow. Second operand 10 states and 209 transitions. [2024-06-14 12:00:32,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 455 transitions, 7430 flow [2024-06-14 12:00:34,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 455 transitions, 7254 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-14 12:00:34,641 INFO L231 Difference]: Finished difference. Result has 307 places, 410 transitions, 6161 flow [2024-06-14 12:00:34,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5922, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6161, PETRI_PLACES=307, PETRI_TRANSITIONS=410} [2024-06-14 12:00:34,641 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 262 predicate places. [2024-06-14 12:00:34,642 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 410 transitions, 6161 flow [2024-06-14 12:00:34,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:34,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:34,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:34,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 12:00:34,642 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:00:34,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:34,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1284084412, now seen corresponding path program 13 times [2024-06-14 12:00:34,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:34,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414926815] [2024-06-14 12:00:34,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:34,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:34,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:36,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:36,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:36,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414926815] [2024-06-14 12:00:36,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414926815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:36,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:36,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:00:36,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146171518] [2024-06-14 12:00:36,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:36,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:00:36,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:36,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:00:36,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:00:36,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:00:36,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 410 transitions, 6161 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:36,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:36,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:00:36,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:38,427 INFO L124 PetriNetUnfolderBase]: 4708/7385 cut-off events. [2024-06-14 12:00:38,427 INFO L125 PetriNetUnfolderBase]: For 1585455/1585458 co-relation queries the response was YES. [2024-06-14 12:00:38,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77344 conditions, 7385 events. 4708/7385 cut-off events. For 1585455/1585458 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 44326 event pairs, 968 based on Foata normal form. 20/7401 useless extension candidates. Maximal degree in co-relation 77193. Up to 6213 conditions per place. [2024-06-14 12:00:38,557 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 310 selfloop transitions, 109 changer transitions 0/455 dead transitions. [2024-06-14 12:00:38,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 455 transitions, 7533 flow [2024-06-14 12:00:38,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:00:38,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:00:38,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-14 12:00:38,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4727272727272727 [2024-06-14 12:00:38,559 INFO L175 Difference]: Start difference. First operand has 307 places, 410 transitions, 6161 flow. Second operand 10 states and 208 transitions. [2024-06-14 12:00:38,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 455 transitions, 7533 flow [2024-06-14 12:00:41,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 455 transitions, 7300 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 12:00:41,442 INFO L231 Difference]: Finished difference. Result has 309 places, 411 transitions, 6193 flow [2024-06-14 12:00:41,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5928, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6193, PETRI_PLACES=309, PETRI_TRANSITIONS=411} [2024-06-14 12:00:41,443 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 264 predicate places. [2024-06-14 12:00:41,443 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 411 transitions, 6193 flow [2024-06-14 12:00:41,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:41,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:41,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:41,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 12:00:41,444 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:00:41,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:41,444 INFO L85 PathProgramCache]: Analyzing trace with hash -848996978, now seen corresponding path program 14 times [2024-06-14 12:00:41,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:41,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364778908] [2024-06-14 12:00:41,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:41,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:41,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:43,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:43,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:43,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364778908] [2024-06-14 12:00:43,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364778908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:43,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:43,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:00:43,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934019683] [2024-06-14 12:00:43,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:43,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:00:43,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:43,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:00:43,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:00:43,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:00:43,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 411 transitions, 6193 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:43,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:43,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:00:43,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:45,324 INFO L124 PetriNetUnfolderBase]: 4672/7329 cut-off events. [2024-06-14 12:00:45,325 INFO L125 PetriNetUnfolderBase]: For 1553279/1553282 co-relation queries the response was YES. [2024-06-14 12:00:45,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75766 conditions, 7329 events. 4672/7329 cut-off events. For 1553279/1553282 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 43944 event pairs, 960 based on Foata normal form. 20/7345 useless extension candidates. Maximal degree in co-relation 75614. Up to 6236 conditions per place. [2024-06-14 12:00:45,441 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 323 selfloop transitions, 94 changer transitions 0/453 dead transitions. [2024-06-14 12:00:45,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 453 transitions, 7201 flow [2024-06-14 12:00:45,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:00:45,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:00:45,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-14 12:00:45,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636363636363636 [2024-06-14 12:00:45,442 INFO L175 Difference]: Start difference. First operand has 309 places, 411 transitions, 6193 flow. Second operand 10 states and 204 transitions. [2024-06-14 12:00:45,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 453 transitions, 7201 flow [2024-06-14 12:00:48,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 453 transitions, 6958 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-14 12:00:48,423 INFO L231 Difference]: Finished difference. Result has 311 places, 411 transitions, 6145 flow [2024-06-14 12:00:48,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5950, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6145, PETRI_PLACES=311, PETRI_TRANSITIONS=411} [2024-06-14 12:00:48,424 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 266 predicate places. [2024-06-14 12:00:48,424 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 411 transitions, 6145 flow [2024-06-14 12:00:48,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:48,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:48,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:48,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 12:00:48,425 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:00:48,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:48,425 INFO L85 PathProgramCache]: Analyzing trace with hash -99662771, now seen corresponding path program 1 times [2024-06-14 12:00:48,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:48,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963639046] [2024-06-14 12:00:48,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:48,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:48,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:49,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:49,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:49,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963639046] [2024-06-14 12:00:49,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963639046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:49,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:49,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:00:49,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99087648] [2024-06-14 12:00:49,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:49,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:00:49,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:49,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:00:49,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:00:49,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:00:49,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 411 transitions, 6145 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:49,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:49,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:00:49,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:51,852 INFO L124 PetriNetUnfolderBase]: 5086/7834 cut-off events. [2024-06-14 12:00:51,852 INFO L125 PetriNetUnfolderBase]: For 1528031/1528038 co-relation queries the response was YES. [2024-06-14 12:00:51,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78941 conditions, 7834 events. 5086/7834 cut-off events. For 1528031/1528038 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 45430 event pairs, 1324 based on Foata normal form. 6/7808 useless extension candidates. Maximal degree in co-relation 78788. Up to 7163 conditions per place. [2024-06-14 12:00:52,025 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 272 selfloop transitions, 145 changer transitions 0/447 dead transitions. [2024-06-14 12:00:52,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 447 transitions, 7605 flow [2024-06-14 12:00:52,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:00:52,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:00:52,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-14 12:00:52,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-14 12:00:52,027 INFO L175 Difference]: Start difference. First operand has 311 places, 411 transitions, 6145 flow. Second operand 8 states and 159 transitions. [2024-06-14 12:00:52,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 447 transitions, 7605 flow [2024-06-14 12:00:55,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 447 transitions, 7402 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-14 12:00:55,287 INFO L231 Difference]: Finished difference. Result has 310 places, 419 transitions, 6399 flow [2024-06-14 12:00:55,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5942, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6399, PETRI_PLACES=310, PETRI_TRANSITIONS=419} [2024-06-14 12:00:55,288 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 265 predicate places. [2024-06-14 12:00:55,288 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 419 transitions, 6399 flow [2024-06-14 12:00:55,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:55,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:55,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:55,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 12:00:55,289 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:00:55,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:55,289 INFO L85 PathProgramCache]: Analyzing trace with hash -99334078, now seen corresponding path program 1 times [2024-06-14 12:00:55,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:55,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059790279] [2024-06-14 12:00:55,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:55,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:55,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:56,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:56,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:56,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059790279] [2024-06-14 12:00:56,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059790279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:56,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:56,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:00:56,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575470843] [2024-06-14 12:00:56,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:56,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:00:56,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:56,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:00:56,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:00:56,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:00:56,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 419 transitions, 6399 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:56,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:56,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:00:56,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:58,388 INFO L124 PetriNetUnfolderBase]: 5227/8032 cut-off events. [2024-06-14 12:00:58,389 INFO L125 PetriNetUnfolderBase]: For 1632914/1632917 co-relation queries the response was YES. [2024-06-14 12:00:58,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82156 conditions, 8032 events. 5227/8032 cut-off events. For 1632914/1632917 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 46650 event pairs, 1353 based on Foata normal form. 8/8008 useless extension candidates. Maximal degree in co-relation 82002. Up to 7357 conditions per place. [2024-06-14 12:00:58,520 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 327 selfloop transitions, 108 changer transitions 0/465 dead transitions. [2024-06-14 12:00:58,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 465 transitions, 7982 flow [2024-06-14 12:00:58,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:00:58,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:00:58,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 12:00:58,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217171717171717 [2024-06-14 12:00:58,521 INFO L175 Difference]: Start difference. First operand has 310 places, 419 transitions, 6399 flow. Second operand 9 states and 167 transitions. [2024-06-14 12:00:58,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 465 transitions, 7982 flow [2024-06-14 12:01:02,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 465 transitions, 7614 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-14 12:01:02,890 INFO L231 Difference]: Finished difference. Result has 316 places, 440 transitions, 6628 flow [2024-06-14 12:01:02,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6035, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6628, PETRI_PLACES=316, PETRI_TRANSITIONS=440} [2024-06-14 12:01:02,891 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 271 predicate places. [2024-06-14 12:01:02,891 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 440 transitions, 6628 flow [2024-06-14 12:01:02,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:02,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:02,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:02,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 12:01:02,892 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:01:02,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:02,892 INFO L85 PathProgramCache]: Analyzing trace with hash -791869285, now seen corresponding path program 2 times [2024-06-14 12:01:02,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:02,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660056364] [2024-06-14 12:01:02,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:02,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:02,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:04,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:04,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:04,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660056364] [2024-06-14 12:01:04,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660056364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:04,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:04,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:01:04,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998305804] [2024-06-14 12:01:04,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:04,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:01:04,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:04,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:01:04,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:01:04,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:01:04,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 440 transitions, 6628 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:04,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:04,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:01:04,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:06,157 INFO L124 PetriNetUnfolderBase]: 5237/8043 cut-off events. [2024-06-14 12:01:06,157 INFO L125 PetriNetUnfolderBase]: For 1649362/1649369 co-relation queries the response was YES. [2024-06-14 12:01:06,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83400 conditions, 8043 events. 5237/8043 cut-off events. For 1649362/1649369 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 46763 event pairs, 1330 based on Foata normal form. 6/8017 useless extension candidates. Maximal degree in co-relation 83243. Up to 7459 conditions per place. [2024-06-14 12:01:06,537 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 292 selfloop transitions, 143 changer transitions 0/465 dead transitions. [2024-06-14 12:01:06,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 465 transitions, 7816 flow [2024-06-14 12:01:06,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:01:06,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:01:06,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 12:01:06,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-14 12:01:06,539 INFO L175 Difference]: Start difference. First operand has 316 places, 440 transitions, 6628 flow. Second operand 8 states and 151 transitions. [2024-06-14 12:01:06,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 465 transitions, 7816 flow [2024-06-14 12:01:09,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 465 transitions, 7710 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-14 12:01:09,432 INFO L231 Difference]: Finished difference. Result has 321 places, 444 transitions, 6884 flow [2024-06-14 12:01:09,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6522, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6884, PETRI_PLACES=321, PETRI_TRANSITIONS=444} [2024-06-14 12:01:09,433 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 276 predicate places. [2024-06-14 12:01:09,434 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 444 transitions, 6884 flow [2024-06-14 12:01:09,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:09,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:09,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:09,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 12:01:09,434 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:01:09,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:09,435 INFO L85 PathProgramCache]: Analyzing trace with hash -88221508, now seen corresponding path program 2 times [2024-06-14 12:01:09,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:09,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981808825] [2024-06-14 12:01:09,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:09,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:09,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:10,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:10,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:10,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981808825] [2024-06-14 12:01:10,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981808825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:10,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:10,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:01:10,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486995028] [2024-06-14 12:01:10,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:10,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:01:10,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:10,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:01:10,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:01:10,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:01:10,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 444 transitions, 6884 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:10,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:10,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:01:10,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:12,521 INFO L124 PetriNetUnfolderBase]: 5369/8228 cut-off events. [2024-06-14 12:01:12,521 INFO L125 PetriNetUnfolderBase]: For 1757575/1757578 co-relation queries the response was YES. [2024-06-14 12:01:12,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86452 conditions, 8228 events. 5369/8228 cut-off events. For 1757575/1757578 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 47880 event pairs, 1363 based on Foata normal form. 8/8204 useless extension candidates. Maximal degree in co-relation 86293. Up to 7466 conditions per place. [2024-06-14 12:01:12,638 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 347 selfloop transitions, 102 changer transitions 0/479 dead transitions. [2024-06-14 12:01:12,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 479 transitions, 8641 flow [2024-06-14 12:01:12,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:01:12,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:01:12,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 12:01:12,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41414141414141414 [2024-06-14 12:01:12,640 INFO L175 Difference]: Start difference. First operand has 321 places, 444 transitions, 6884 flow. Second operand 9 states and 164 transitions. [2024-06-14 12:01:12,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 479 transitions, 8641 flow [2024-06-14 12:01:15,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 479 transitions, 8325 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-14 12:01:15,694 INFO L231 Difference]: Finished difference. Result has 325 places, 455 transitions, 6991 flow [2024-06-14 12:01:15,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6568, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6991, PETRI_PLACES=325, PETRI_TRANSITIONS=455} [2024-06-14 12:01:15,709 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 280 predicate places. [2024-06-14 12:01:15,709 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 455 transitions, 6991 flow [2024-06-14 12:01:15,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:15,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:15,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:15,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 12:01:15,710 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:01:15,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:15,710 INFO L85 PathProgramCache]: Analyzing trace with hash -88234931, now seen corresponding path program 3 times [2024-06-14 12:01:15,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:15,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678513816] [2024-06-14 12:01:15,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:15,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:15,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:16,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:16,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:16,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678513816] [2024-06-14 12:01:16,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678513816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:16,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:16,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:01:16,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294909717] [2024-06-14 12:01:16,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:16,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:01:16,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:16,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:01:16,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:01:17,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:01:17,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 455 transitions, 6991 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:17,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:17,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:01:17,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:19,052 INFO L124 PetriNetUnfolderBase]: 5381/8245 cut-off events. [2024-06-14 12:01:19,052 INFO L125 PetriNetUnfolderBase]: For 1771115/1771118 co-relation queries the response was YES. [2024-06-14 12:01:19,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87037 conditions, 8245 events. 5381/8245 cut-off events. For 1771115/1771118 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 48012 event pairs, 1377 based on Foata normal form. 4/8217 useless extension candidates. Maximal degree in co-relation 86876. Up to 7786 conditions per place. [2024-06-14 12:01:19,189 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 354 selfloop transitions, 90 changer transitions 0/474 dead transitions. [2024-06-14 12:01:19,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 474 transitions, 8375 flow [2024-06-14 12:01:19,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:01:19,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:01:19,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-14 12:01:19,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-14 12:01:19,191 INFO L175 Difference]: Start difference. First operand has 325 places, 455 transitions, 6991 flow. Second operand 9 states and 154 transitions. [2024-06-14 12:01:19,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 474 transitions, 8375 flow [2024-06-14 12:01:22,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 474 transitions, 8152 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-14 12:01:22,343 INFO L231 Difference]: Finished difference. Result has 329 places, 459 transitions, 7028 flow [2024-06-14 12:01:22,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6768, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7028, PETRI_PLACES=329, PETRI_TRANSITIONS=459} [2024-06-14 12:01:22,344 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 284 predicate places. [2024-06-14 12:01:22,344 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 459 transitions, 7028 flow [2024-06-14 12:01:22,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:22,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:22,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:22,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 12:01:22,345 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:01:22,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:22,345 INFO L85 PathProgramCache]: Analyzing trace with hash -588719806, now seen corresponding path program 3 times [2024-06-14 12:01:22,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:22,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669569031] [2024-06-14 12:01:22,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:22,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:22,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:23,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:23,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:23,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669569031] [2024-06-14 12:01:23,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669569031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:23,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:23,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:01:23,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8446898] [2024-06-14 12:01:23,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:23,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:01:23,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:23,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:01:23,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:01:23,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:01:23,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 459 transitions, 7028 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:23,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:23,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:01:23,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:25,947 INFO L124 PetriNetUnfolderBase]: 5369/8230 cut-off events. [2024-06-14 12:01:25,947 INFO L125 PetriNetUnfolderBase]: For 1793120/1793123 co-relation queries the response was YES. [2024-06-14 12:01:26,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86177 conditions, 8230 events. 5369/8230 cut-off events. For 1793120/1793123 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 47861 event pairs, 1367 based on Foata normal form. 8/8206 useless extension candidates. Maximal degree in co-relation 86015. Up to 7479 conditions per place. [2024-06-14 12:01:26,106 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 352 selfloop transitions, 102 changer transitions 0/484 dead transitions. [2024-06-14 12:01:26,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 484 transitions, 8438 flow [2024-06-14 12:01:26,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:01:26,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:01:26,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 12:01:26,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41919191919191917 [2024-06-14 12:01:26,108 INFO L175 Difference]: Start difference. First operand has 329 places, 459 transitions, 7028 flow. Second operand 9 states and 166 transitions. [2024-06-14 12:01:26,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 484 transitions, 8438 flow [2024-06-14 12:01:29,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 484 transitions, 8276 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-14 12:01:29,967 INFO L231 Difference]: Finished difference. Result has 333 places, 460 transitions, 7109 flow [2024-06-14 12:01:29,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6866, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7109, PETRI_PLACES=333, PETRI_TRANSITIONS=460} [2024-06-14 12:01:29,968 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 288 predicate places. [2024-06-14 12:01:29,968 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 460 transitions, 7109 flow [2024-06-14 12:01:29,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:29,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:29,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:29,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 12:01:29,969 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:01:29,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:29,970 INFO L85 PathProgramCache]: Analyzing trace with hash -260407327, now seen corresponding path program 3 times [2024-06-14 12:01:29,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:29,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043254972] [2024-06-14 12:01:29,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:29,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:29,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:30,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:30,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:30,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043254972] [2024-06-14 12:01:30,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043254972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:30,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:30,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:01:30,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935379100] [2024-06-14 12:01:30,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:30,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:01:30,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:30,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:01:30,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:01:31,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:01:31,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 460 transitions, 7109 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:31,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:31,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:01:31,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:33,043 INFO L124 PetriNetUnfolderBase]: 5351/8202 cut-off events. [2024-06-14 12:01:33,044 INFO L125 PetriNetUnfolderBase]: For 1796578/1796578 co-relation queries the response was YES. [2024-06-14 12:01:33,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86256 conditions, 8202 events. 5351/8202 cut-off events. For 1796578/1796578 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 47693 event pairs, 1387 based on Foata normal form. 2/8173 useless extension candidates. Maximal degree in co-relation 86093. Up to 7942 conditions per place. [2024-06-14 12:01:33,230 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 416 selfloop transitions, 30 changer transitions 0/476 dead transitions. [2024-06-14 12:01:33,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 476 transitions, 8259 flow [2024-06-14 12:01:33,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:01:33,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:01:33,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-14 12:01:33,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-14 12:01:33,232 INFO L175 Difference]: Start difference. First operand has 333 places, 460 transitions, 7109 flow. Second operand 7 states and 126 transitions. [2024-06-14 12:01:33,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 476 transitions, 8259 flow [2024-06-14 12:01:37,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 476 transitions, 8039 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-14 12:01:37,696 INFO L231 Difference]: Finished difference. Result has 334 places, 460 transitions, 6958 flow [2024-06-14 12:01:37,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6889, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6958, PETRI_PLACES=334, PETRI_TRANSITIONS=460} [2024-06-14 12:01:37,696 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 289 predicate places. [2024-06-14 12:01:37,697 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 460 transitions, 6958 flow [2024-06-14 12:01:37,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:37,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:37,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:37,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 12:01:37,697 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:01:37,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:37,698 INFO L85 PathProgramCache]: Analyzing trace with hash -2011992837, now seen corresponding path program 4 times [2024-06-14 12:01:37,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:37,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724255793] [2024-06-14 12:01:37,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:37,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:37,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:38,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:38,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:38,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724255793] [2024-06-14 12:01:38,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724255793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:38,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:38,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:01:38,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21045530] [2024-06-14 12:01:38,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:38,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:01:38,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:38,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:01:38,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:01:38,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:01:38,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 460 transitions, 6958 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:38,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:38,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:01:38,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:40,986 INFO L124 PetriNetUnfolderBase]: 5356/8209 cut-off events. [2024-06-14 12:01:40,986 INFO L125 PetriNetUnfolderBase]: For 1823833/1823833 co-relation queries the response was YES. [2024-06-14 12:01:41,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86218 conditions, 8209 events. 5356/8209 cut-off events. For 1823833/1823833 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 47781 event pairs, 1379 based on Foata normal form. 1/8179 useless extension candidates. Maximal degree in co-relation 86054. Up to 7969 conditions per place. [2024-06-14 12:01:41,176 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 424 selfloop transitions, 21 changer transitions 0/475 dead transitions. [2024-06-14 12:01:41,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 475 transitions, 7964 flow [2024-06-14 12:01:41,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:01:41,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:01:41,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 12:01:41,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3721590909090909 [2024-06-14 12:01:41,178 INFO L175 Difference]: Start difference. First operand has 334 places, 460 transitions, 6958 flow. Second operand 8 states and 131 transitions. [2024-06-14 12:01:41,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 475 transitions, 7964 flow [2024-06-14 12:01:45,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 475 transitions, 7737 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 12:01:45,263 INFO L231 Difference]: Finished difference. Result has 336 places, 463 transitions, 6859 flow [2024-06-14 12:01:45,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6742, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6859, PETRI_PLACES=336, PETRI_TRANSITIONS=463} [2024-06-14 12:01:45,266 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 291 predicate places. [2024-06-14 12:01:45,266 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 463 transitions, 6859 flow [2024-06-14 12:01:45,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:45,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:45,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:45,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 12:01:45,267 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:01:45,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:45,267 INFO L85 PathProgramCache]: Analyzing trace with hash 494653487, now seen corresponding path program 5 times [2024-06-14 12:01:45,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:45,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410155332] [2024-06-14 12:01:45,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:45,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:45,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:46,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:46,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:46,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410155332] [2024-06-14 12:01:46,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410155332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:46,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:46,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:01:46,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722583784] [2024-06-14 12:01:46,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:46,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:01:46,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:46,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:01:46,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:01:46,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:01:46,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 463 transitions, 6859 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:46,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:46,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:01:46,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:48,369 INFO L124 PetriNetUnfolderBase]: 5353/8206 cut-off events. [2024-06-14 12:01:48,370 INFO L125 PetriNetUnfolderBase]: For 1849480/1849483 co-relation queries the response was YES. [2024-06-14 12:01:48,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86149 conditions, 8206 events. 5353/8206 cut-off events. For 1849480/1849483 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 47760 event pairs, 1389 based on Foata normal form. 3/8177 useless extension candidates. Maximal degree in co-relation 85985. Up to 7965 conditions per place. [2024-06-14 12:01:48,507 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 421 selfloop transitions, 21 changer transitions 0/472 dead transitions. [2024-06-14 12:01:48,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 472 transitions, 7771 flow [2024-06-14 12:01:48,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:01:48,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:01:48,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 12:01:48,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-14 12:01:48,509 INFO L175 Difference]: Start difference. First operand has 336 places, 463 transitions, 6859 flow. Second operand 8 states and 128 transitions. [2024-06-14 12:01:48,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 472 transitions, 7771 flow [2024-06-14 12:01:52,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 472 transitions, 7697 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-14 12:01:52,851 INFO L231 Difference]: Finished difference. Result has 338 places, 463 transitions, 6833 flow [2024-06-14 12:01:52,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6785, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6833, PETRI_PLACES=338, PETRI_TRANSITIONS=463} [2024-06-14 12:01:52,851 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 293 predicate places. [2024-06-14 12:01:52,852 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 463 transitions, 6833 flow [2024-06-14 12:01:52,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:52,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:52,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:52,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 12:01:52,852 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:01:52,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:52,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1774179861, now seen corresponding path program 6 times [2024-06-14 12:01:52,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:52,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835254719] [2024-06-14 12:01:52,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:52,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:52,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:53,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:53,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:53,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835254719] [2024-06-14 12:01:53,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835254719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:53,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:53,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:01:53,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454814557] [2024-06-14 12:01:53,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:53,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:01:53,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:53,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:01:53,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:01:53,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:01:53,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 463 transitions, 6833 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:53,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:53,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:01:53,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:56,044 INFO L124 PetriNetUnfolderBase]: 5345/8195 cut-off events. [2024-06-14 12:01:56,044 INFO L125 PetriNetUnfolderBase]: For 1877711/1877714 co-relation queries the response was YES. [2024-06-14 12:01:56,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86143 conditions, 8195 events. 5345/8195 cut-off events. For 1877711/1877714 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 47685 event pairs, 1389 based on Foata normal form. 4/8167 useless extension candidates. Maximal degree in co-relation 85978. Up to 7932 conditions per place. [2024-06-14 12:01:56,193 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 412 selfloop transitions, 30 changer transitions 0/472 dead transitions. [2024-06-14 12:01:56,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 472 transitions, 7745 flow [2024-06-14 12:01:56,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:01:56,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:01:56,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-14 12:01:56,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-14 12:01:56,195 INFO L175 Difference]: Start difference. First operand has 338 places, 463 transitions, 6833 flow. Second operand 7 states and 121 transitions. [2024-06-14 12:01:56,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 472 transitions, 7745 flow [2024-06-14 12:02:00,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 472 transitions, 7669 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-14 12:02:00,875 INFO L231 Difference]: Finished difference. Result has 338 places, 463 transitions, 6825 flow [2024-06-14 12:02:00,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6757, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6825, PETRI_PLACES=338, PETRI_TRANSITIONS=463} [2024-06-14 12:02:00,876 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 293 predicate places. [2024-06-14 12:02:00,876 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 463 transitions, 6825 flow [2024-06-14 12:02:00,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:00,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:00,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:02:00,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 12:02:00,877 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:02:00,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:00,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1161228368, now seen corresponding path program 1 times [2024-06-14 12:02:00,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:00,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034965662] [2024-06-14 12:02:00,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:00,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:00,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:02,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:02,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:02,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034965662] [2024-06-14 12:02:02,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034965662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:02,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:02,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:02:02,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117499166] [2024-06-14 12:02:02,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:02,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:02:02,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:02,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:02:02,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:02:02,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:02:02,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 463 transitions, 6825 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:02,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:02,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:02:02,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:04,849 INFO L124 PetriNetUnfolderBase]: 5420/8298 cut-off events. [2024-06-14 12:02:04,849 INFO L125 PetriNetUnfolderBase]: For 1943580/1943583 co-relation queries the response was YES. [2024-06-14 12:02:04,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87547 conditions, 8298 events. 5420/8298 cut-off events. For 1943580/1943583 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 48276 event pairs, 1311 based on Foata normal form. 4/8287 useless extension candidates. Maximal degree in co-relation 87381. Up to 7913 conditions per place. [2024-06-14 12:02:05,027 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 430 selfloop transitions, 33 changer transitions 0/502 dead transitions. [2024-06-14 12:02:05,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 502 transitions, 7977 flow [2024-06-14 12:02:05,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:02:05,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:02:05,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-14 12:02:05,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-14 12:02:05,029 INFO L175 Difference]: Start difference. First operand has 338 places, 463 transitions, 6825 flow. Second operand 10 states and 180 transitions. [2024-06-14 12:02:05,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 502 transitions, 7977 flow [2024-06-14 12:02:09,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 502 transitions, 7907 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 12:02:09,639 INFO L231 Difference]: Finished difference. Result has 343 places, 468 transitions, 6932 flow [2024-06-14 12:02:09,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6755, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6932, PETRI_PLACES=343, PETRI_TRANSITIONS=468} [2024-06-14 12:02:09,640 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 298 predicate places. [2024-06-14 12:02:09,640 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 468 transitions, 6932 flow [2024-06-14 12:02:09,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:09,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:09,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:02:09,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 12:02:09,641 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:02:09,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:09,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1749991166, now seen corresponding path program 4 times [2024-06-14 12:02:09,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:09,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574803077] [2024-06-14 12:02:09,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:09,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:09,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:10,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:10,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:10,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574803077] [2024-06-14 12:02:10,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574803077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:10,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:10,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:02:10,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939917698] [2024-06-14 12:02:10,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:10,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:02:10,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:10,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:02:10,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:02:10,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:02:10,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 468 transitions, 6932 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:10,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:10,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:02:10,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:13,431 INFO L124 PetriNetUnfolderBase]: 5653/8627 cut-off events. [2024-06-14 12:02:13,432 INFO L125 PetriNetUnfolderBase]: For 2079676/2079679 co-relation queries the response was YES. [2024-06-14 12:02:13,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92153 conditions, 8627 events. 5653/8627 cut-off events. For 2079676/2079679 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 50410 event pairs, 1323 based on Foata normal form. 8/8603 useless extension candidates. Maximal degree in co-relation 91985. Up to 7677 conditions per place. [2024-06-14 12:02:13,644 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 378 selfloop transitions, 147 changer transitions 0/555 dead transitions. [2024-06-14 12:02:13,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 555 transitions, 9493 flow [2024-06-14 12:02:13,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:02:13,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:02:13,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-14 12:02:13,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:02:13,646 INFO L175 Difference]: Start difference. First operand has 343 places, 468 transitions, 6932 flow. Second operand 9 states and 176 transitions. [2024-06-14 12:02:13,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 555 transitions, 9493 flow [2024-06-14 12:02:18,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 555 transitions, 9370 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-14 12:02:18,936 INFO L231 Difference]: Finished difference. Result has 349 places, 512 transitions, 7944 flow [2024-06-14 12:02:18,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6809, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7944, PETRI_PLACES=349, PETRI_TRANSITIONS=512} [2024-06-14 12:02:18,936 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 304 predicate places. [2024-06-14 12:02:18,936 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 512 transitions, 7944 flow [2024-06-14 12:02:18,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:18,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:18,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:02:18,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 12:02:18,937 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:02:18,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:18,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1161474632, now seen corresponding path program 15 times [2024-06-14 12:02:18,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:18,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519837358] [2024-06-14 12:02:18,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:18,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:18,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:20,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:20,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:20,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519837358] [2024-06-14 12:02:20,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519837358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:20,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:20,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:02:20,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906633178] [2024-06-14 12:02:20,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:20,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:02:20,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:20,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:02:20,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:02:20,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:02:20,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 512 transitions, 7944 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:20,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:20,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:02:20,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:23,182 INFO L124 PetriNetUnfolderBase]: 5333/8274 cut-off events. [2024-06-14 12:02:23,182 INFO L125 PetriNetUnfolderBase]: For 2204044/2204052 co-relation queries the response was YES. [2024-06-14 12:02:23,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92941 conditions, 8274 events. 5333/8274 cut-off events. For 2204044/2204052 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 50250 event pairs, 1199 based on Foata normal form. 22/8265 useless extension candidates. Maximal degree in co-relation 92768. Up to 7520 conditions per place. [2024-06-14 12:02:23,324 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 463 selfloop transitions, 49 changer transitions 0/554 dead transitions. [2024-06-14 12:02:23,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 554 transitions, 9534 flow [2024-06-14 12:02:23,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:02:23,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:02:23,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-14 12:02:23,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-14 12:02:23,326 INFO L175 Difference]: Start difference. First operand has 349 places, 512 transitions, 7944 flow. Second operand 10 states and 198 transitions. [2024-06-14 12:02:23,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 554 transitions, 9534 flow [2024-06-14 12:02:27,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 554 transitions, 9397 flow, removed 58 selfloop flow, removed 2 redundant places. [2024-06-14 12:02:27,586 INFO L231 Difference]: Finished difference. Result has 357 places, 513 transitions, 7958 flow [2024-06-14 12:02:27,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7807, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7958, PETRI_PLACES=357, PETRI_TRANSITIONS=513} [2024-06-14 12:02:27,587 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 312 predicate places. [2024-06-14 12:02:27,587 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 513 transitions, 7958 flow [2024-06-14 12:02:27,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:27,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:27,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:02:27,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 12:02:27,587 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:02:27,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:27,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1042314047, now seen corresponding path program 1 times [2024-06-14 12:02:27,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:27,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891360977] [2024-06-14 12:02:27,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:27,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:27,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:28,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:28,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:28,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891360977] [2024-06-14 12:02:28,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891360977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:28,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:28,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:02:28,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026464608] [2024-06-14 12:02:28,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:28,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:02:28,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:28,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:02:28,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:02:28,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:02:28,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 513 transitions, 7958 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:28,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:28,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:02:28,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:30,997 INFO L124 PetriNetUnfolderBase]: 5775/8821 cut-off events. [2024-06-14 12:02:30,997 INFO L125 PetriNetUnfolderBase]: For 2169953/2169956 co-relation queries the response was YES. [2024-06-14 12:02:31,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95931 conditions, 8821 events. 5775/8821 cut-off events. For 2169953/2169956 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 51927 event pairs, 1385 based on Foata normal form. 8/8788 useless extension candidates. Maximal degree in co-relation 95756. Up to 7951 conditions per place. [2024-06-14 12:02:31,132 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 401 selfloop transitions, 135 changer transitions 0/566 dead transitions. [2024-06-14 12:02:31,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 566 transitions, 10166 flow [2024-06-14 12:02:31,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:02:31,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:02:31,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-14 12:02:31,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41363636363636364 [2024-06-14 12:02:31,133 INFO L175 Difference]: Start difference. First operand has 357 places, 513 transitions, 7958 flow. Second operand 10 states and 182 transitions. [2024-06-14 12:02:31,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 566 transitions, 10166 flow [2024-06-14 12:02:35,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 566 transitions, 10047 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-14 12:02:35,675 INFO L231 Difference]: Finished difference. Result has 361 places, 526 transitions, 8369 flow [2024-06-14 12:02:35,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7839, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8369, PETRI_PLACES=361, PETRI_TRANSITIONS=526} [2024-06-14 12:02:35,675 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 316 predicate places. [2024-06-14 12:02:35,675 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 526 transitions, 8369 flow [2024-06-14 12:02:35,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:35,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:35,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:02:35,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 12:02:35,676 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:02:35,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:35,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1130901422, now seen corresponding path program 2 times [2024-06-14 12:02:35,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:35,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25943801] [2024-06-14 12:02:35,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:35,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:35,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:36,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:36,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:36,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25943801] [2024-06-14 12:02:36,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25943801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:36,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:36,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:02:36,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239567567] [2024-06-14 12:02:36,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:36,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:02:36,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:36,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:02:36,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:02:37,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:02:37,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 526 transitions, 8369 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:37,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:37,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:02:37,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:39,269 INFO L124 PetriNetUnfolderBase]: 5855/8927 cut-off events. [2024-06-14 12:02:39,269 INFO L125 PetriNetUnfolderBase]: For 2218696/2218701 co-relation queries the response was YES. [2024-06-14 12:02:39,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98200 conditions, 8927 events. 5855/8927 cut-off events. For 2218696/2218701 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 52489 event pairs, 1434 based on Foata normal form. 4/8901 useless extension candidates. Maximal degree in co-relation 98022. Up to 8492 conditions per place. [2024-06-14 12:02:39,430 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 482 selfloop transitions, 45 changer transitions 0/566 dead transitions. [2024-06-14 12:02:39,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 566 transitions, 9675 flow [2024-06-14 12:02:39,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:02:39,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:02:39,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-14 12:02:39,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41363636363636364 [2024-06-14 12:02:39,432 INFO L175 Difference]: Start difference. First operand has 361 places, 526 transitions, 8369 flow. Second operand 10 states and 182 transitions. [2024-06-14 12:02:39,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 566 transitions, 9675 flow [2024-06-14 12:02:43,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 566 transitions, 9497 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-14 12:02:43,634 INFO L231 Difference]: Finished difference. Result has 369 places, 531 transitions, 8401 flow [2024-06-14 12:02:43,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8192, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8401, PETRI_PLACES=369, PETRI_TRANSITIONS=531} [2024-06-14 12:02:43,635 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 324 predicate places. [2024-06-14 12:02:43,635 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 531 transitions, 8401 flow [2024-06-14 12:02:43,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:43,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:43,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:02:43,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 12:02:43,636 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:02:43,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:43,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1473607715, now seen corresponding path program 2 times [2024-06-14 12:02:43,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:43,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316437360] [2024-06-14 12:02:43,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:43,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:43,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:44,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:44,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:44,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316437360] [2024-06-14 12:02:44,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316437360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:44,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:44,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:02:44,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113267340] [2024-06-14 12:02:44,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:44,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:02:44,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:44,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:02:44,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:02:44,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:02:44,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 531 transitions, 8401 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:44,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:44,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:02:44,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:47,130 INFO L124 PetriNetUnfolderBase]: 5822/8890 cut-off events. [2024-06-14 12:02:47,131 INFO L125 PetriNetUnfolderBase]: For 2251786/2251789 co-relation queries the response was YES. [2024-06-14 12:02:47,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98108 conditions, 8890 events. 5822/8890 cut-off events. For 2251786/2251789 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 52325 event pairs, 1364 based on Foata normal form. 8/8857 useless extension candidates. Maximal degree in co-relation 97927. Up to 8000 conditions per place. [2024-06-14 12:02:47,380 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 409 selfloop transitions, 138 changer transitions 0/577 dead transitions. [2024-06-14 12:02:47,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 577 transitions, 10580 flow [2024-06-14 12:02:47,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:02:47,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:02:47,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-14 12:02:47,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-14 12:02:47,383 INFO L175 Difference]: Start difference. First operand has 369 places, 531 transitions, 8401 flow. Second operand 10 states and 185 transitions. [2024-06-14 12:02:47,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 577 transitions, 10580 flow [2024-06-14 12:02:51,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 577 transitions, 10425 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-14 12:02:51,959 INFO L231 Difference]: Finished difference. Result has 372 places, 535 transitions, 8606 flow [2024-06-14 12:02:51,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8246, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8606, PETRI_PLACES=372, PETRI_TRANSITIONS=535} [2024-06-14 12:02:51,960 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 327 predicate places. [2024-06-14 12:02:51,960 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 535 transitions, 8606 flow [2024-06-14 12:02:51,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:51,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:51,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:02:51,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 12:02:51,961 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:02:51,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:51,962 INFO L85 PathProgramCache]: Analyzing trace with hash -2094944832, now seen corresponding path program 3 times [2024-06-14 12:02:51,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:51,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118538063] [2024-06-14 12:02:51,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:51,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:51,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:53,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:53,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:53,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118538063] [2024-06-14 12:02:53,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118538063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:53,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:53,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:02:53,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897501264] [2024-06-14 12:02:53,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:53,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:02:53,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:53,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:02:53,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:02:53,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:02:53,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 535 transitions, 8606 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:53,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:53,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:02:53,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:56,059 INFO L124 PetriNetUnfolderBase]: 5892/8984 cut-off events. [2024-06-14 12:02:56,059 INFO L125 PetriNetUnfolderBase]: For 2293492/2293497 co-relation queries the response was YES. [2024-06-14 12:02:56,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99687 conditions, 8984 events. 5892/8984 cut-off events. For 2293492/2293497 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 52862 event pairs, 1440 based on Foata normal form. 4/8958 useless extension candidates. Maximal degree in co-relation 99505. Up to 8662 conditions per place. [2024-06-14 12:02:56,219 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 507 selfloop transitions, 23 changer transitions 0/569 dead transitions. [2024-06-14 12:02:56,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 569 transitions, 9866 flow [2024-06-14 12:02:56,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:02:56,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:02:56,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-14 12:02:56,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-06-14 12:02:56,220 INFO L175 Difference]: Start difference. First operand has 372 places, 535 transitions, 8606 flow. Second operand 10 states and 175 transitions. [2024-06-14 12:02:56,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 569 transitions, 9866 flow [2024-06-14 12:03:00,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 569 transitions, 9672 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 12:03:00,235 INFO L231 Difference]: Finished difference. Result has 377 places, 537 transitions, 8545 flow [2024-06-14 12:03:00,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8412, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8545, PETRI_PLACES=377, PETRI_TRANSITIONS=537} [2024-06-14 12:03:00,249 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 332 predicate places. [2024-06-14 12:03:00,249 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 537 transitions, 8545 flow [2024-06-14 12:03:00,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:00,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:00,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:00,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 12:03:00,249 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:00,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:00,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1379755244, now seen corresponding path program 16 times [2024-06-14 12:03:00,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:00,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426666666] [2024-06-14 12:03:00,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:00,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:00,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:01,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:01,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:01,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426666666] [2024-06-14 12:03:01,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426666666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:01,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:01,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:03:01,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48834533] [2024-06-14 12:03:01,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:01,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:03:01,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:01,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:03:01,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:03:01,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:03:01,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 537 transitions, 8545 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:01,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:01,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:03:01,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:04,110 INFO L124 PetriNetUnfolderBase]: 5542/8595 cut-off events. [2024-06-14 12:03:04,110 INFO L125 PetriNetUnfolderBase]: For 2403803/2403811 co-relation queries the response was YES. [2024-06-14 12:03:04,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97206 conditions, 8595 events. 5542/8595 cut-off events. For 2403803/2403811 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 52584 event pairs, 1245 based on Foata normal form. 22/8581 useless extension candidates. Maximal degree in co-relation 97023. Up to 7870 conditions per place. [2024-06-14 12:03:04,278 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 490 selfloop transitions, 44 changer transitions 0/577 dead transitions. [2024-06-14 12:03:04,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 577 transitions, 9825 flow [2024-06-14 12:03:04,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:03:04,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:03:04,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-14 12:03:04,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409090909090909 [2024-06-14 12:03:04,280 INFO L175 Difference]: Start difference. First operand has 377 places, 537 transitions, 8545 flow. Second operand 10 states and 194 transitions. [2024-06-14 12:03:04,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 577 transitions, 9825 flow [2024-06-14 12:03:09,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 577 transitions, 9714 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-14 12:03:09,160 INFO L231 Difference]: Finished difference. Result has 380 places, 538 transitions, 8577 flow [2024-06-14 12:03:09,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8434, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8577, PETRI_PLACES=380, PETRI_TRANSITIONS=538} [2024-06-14 12:03:09,160 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 335 predicate places. [2024-06-14 12:03:09,160 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 538 transitions, 8577 flow [2024-06-14 12:03:09,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:09,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:09,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:09,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 12:03:09,161 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:09,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:09,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1167903722, now seen corresponding path program 17 times [2024-06-14 12:03:09,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:09,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378994839] [2024-06-14 12:03:09,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:09,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:09,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:10,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:10,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:10,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378994839] [2024-06-14 12:03:10,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378994839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:10,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:10,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:03:10,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675277072] [2024-06-14 12:03:10,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:10,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:03:10,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:10,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:03:10,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:03:10,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:03:10,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 538 transitions, 8577 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:10,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:10,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:03:10,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:13,636 INFO L124 PetriNetUnfolderBase]: 5650/8789 cut-off events. [2024-06-14 12:03:13,636 INFO L125 PetriNetUnfolderBase]: For 2507588/2507596 co-relation queries the response was YES. [2024-06-14 12:03:14,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98592 conditions, 8789 events. 5650/8789 cut-off events. For 2507588/2507596 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 54151 event pairs, 1263 based on Foata normal form. 38/8791 useless extension candidates. Maximal degree in co-relation 98408. Up to 7760 conditions per place. [2024-06-14 12:03:14,126 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 484 selfloop transitions, 58 changer transitions 0/585 dead transitions. [2024-06-14 12:03:14,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 585 transitions, 9959 flow [2024-06-14 12:03:14,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:03:14,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:03:14,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-14 12:03:14,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44214876033057854 [2024-06-14 12:03:14,127 INFO L175 Difference]: Start difference. First operand has 380 places, 538 transitions, 8577 flow. Second operand 11 states and 214 transitions. [2024-06-14 12:03:14,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 585 transitions, 9959 flow [2024-06-14 12:03:19,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 585 transitions, 9848 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-14 12:03:19,016 INFO L231 Difference]: Finished difference. Result has 383 places, 540 transitions, 8692 flow [2024-06-14 12:03:19,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8466, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8692, PETRI_PLACES=383, PETRI_TRANSITIONS=540} [2024-06-14 12:03:19,017 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 338 predicate places. [2024-06-14 12:03:19,017 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 540 transitions, 8692 flow [2024-06-14 12:03:19,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:19,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:19,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:19,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 12:03:19,018 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:19,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:19,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1167908372, now seen corresponding path program 18 times [2024-06-14 12:03:19,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:19,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448711552] [2024-06-14 12:03:19,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:19,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:19,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:20,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:20,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:20,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448711552] [2024-06-14 12:03:20,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448711552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:20,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:20,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:03:20,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648248925] [2024-06-14 12:03:20,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:20,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:03:20,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:20,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:03:20,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:03:20,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:03:20,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 540 transitions, 8692 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:20,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:20,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:03:20,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:23,443 INFO L124 PetriNetUnfolderBase]: 5794/9029 cut-off events. [2024-06-14 12:03:23,443 INFO L125 PetriNetUnfolderBase]: For 2538983/2538991 co-relation queries the response was YES. [2024-06-14 12:03:23,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102003 conditions, 9029 events. 5794/9029 cut-off events. For 2538983/2538991 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 56041 event pairs, 1273 based on Foata normal form. 18/9011 useless extension candidates. Maximal degree in co-relation 101818. Up to 7481 conditions per place. [2024-06-14 12:03:23,593 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 473 selfloop transitions, 72 changer transitions 0/588 dead transitions. [2024-06-14 12:03:23,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 588 transitions, 10808 flow [2024-06-14 12:03:23,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:03:23,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:03:23,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-14 12:03:23,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4590909090909091 [2024-06-14 12:03:23,595 INFO L175 Difference]: Start difference. First operand has 383 places, 540 transitions, 8692 flow. Second operand 10 states and 202 transitions. [2024-06-14 12:03:23,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 588 transitions, 10808 flow [2024-06-14 12:03:28,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 588 transitions, 10595 flow, removed 32 selfloop flow, removed 9 redundant places. [2024-06-14 12:03:28,869 INFO L231 Difference]: Finished difference. Result has 385 places, 542 transitions, 8743 flow [2024-06-14 12:03:28,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8489, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8743, PETRI_PLACES=385, PETRI_TRANSITIONS=542} [2024-06-14 12:03:28,869 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 340 predicate places. [2024-06-14 12:03:28,870 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 542 transitions, 8743 flow [2024-06-14 12:03:28,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:28,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:28,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:28,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 12:03:28,870 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:28,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:28,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1799647150, now seen corresponding path program 4 times [2024-06-14 12:03:28,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:28,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826854233] [2024-06-14 12:03:28,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:28,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:28,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:30,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:30,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:30,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826854233] [2024-06-14 12:03:30,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826854233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:30,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:30,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:03:30,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089008095] [2024-06-14 12:03:30,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:30,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:03:30,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:30,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:03:30,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:03:30,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:03:30,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 542 transitions, 8743 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:30,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:30,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:03:30,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:33,406 INFO L124 PetriNetUnfolderBase]: 6264/9604 cut-off events. [2024-06-14 12:03:33,407 INFO L125 PetriNetUnfolderBase]: For 2466634/2466639 co-relation queries the response was YES. [2024-06-14 12:03:33,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105141 conditions, 9604 events. 6264/9604 cut-off events. For 2466634/2466639 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 57793 event pairs, 1570 based on Foata normal form. 4/9578 useless extension candidates. Maximal degree in co-relation 104954. Up to 9255 conditions per place. [2024-06-14 12:03:33,572 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 513 selfloop transitions, 28 changer transitions 0/580 dead transitions. [2024-06-14 12:03:33,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 580 transitions, 10076 flow [2024-06-14 12:03:33,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:03:33,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:03:33,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-14 12:03:33,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40454545454545454 [2024-06-14 12:03:33,574 INFO L175 Difference]: Start difference. First operand has 385 places, 542 transitions, 8743 flow. Second operand 10 states and 178 transitions. [2024-06-14 12:03:33,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 580 transitions, 10076 flow [2024-06-14 12:03:38,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 580 transitions, 9633 flow, removed 24 selfloop flow, removed 10 redundant places. [2024-06-14 12:03:38,944 INFO L231 Difference]: Finished difference. Result has 386 places, 547 transitions, 8500 flow [2024-06-14 12:03:38,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8307, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8500, PETRI_PLACES=386, PETRI_TRANSITIONS=547} [2024-06-14 12:03:38,945 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 341 predicate places. [2024-06-14 12:03:38,945 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 547 transitions, 8500 flow [2024-06-14 12:03:38,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:38,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:38,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:38,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 12:03:38,946 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:38,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:38,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1416736950, now seen corresponding path program 19 times [2024-06-14 12:03:38,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:38,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366297427] [2024-06-14 12:03:38,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:38,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:38,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:40,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:40,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:40,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366297427] [2024-06-14 12:03:40,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366297427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:40,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:40,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:03:40,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420026041] [2024-06-14 12:03:40,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:40,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:03:40,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:40,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:03:40,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:03:40,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:03:40,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 547 transitions, 8500 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:40,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:40,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:03:40,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:43,462 INFO L124 PetriNetUnfolderBase]: 5682/8874 cut-off events. [2024-06-14 12:03:43,462 INFO L125 PetriNetUnfolderBase]: For 2460804/2460812 co-relation queries the response was YES. [2024-06-14 12:03:43,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95365 conditions, 8874 events. 5682/8874 cut-off events. For 2460804/2460812 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 55097 event pairs, 1246 based on Foata normal form. 38/8876 useless extension candidates. Maximal degree in co-relation 95179. Up to 8061 conditions per place. [2024-06-14 12:03:43,623 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 500 selfloop transitions, 43 changer transitions 0/587 dead transitions. [2024-06-14 12:03:43,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 587 transitions, 10132 flow [2024-06-14 12:03:43,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:03:43,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:03:43,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-14 12:03:43,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43863636363636366 [2024-06-14 12:03:43,625 INFO L175 Difference]: Start difference. First operand has 386 places, 547 transitions, 8500 flow. Second operand 10 states and 193 transitions. [2024-06-14 12:03:43,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 587 transitions, 10132 flow [2024-06-14 12:03:49,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 587 transitions, 9969 flow, removed 56 selfloop flow, removed 7 redundant places. [2024-06-14 12:03:49,777 INFO L231 Difference]: Finished difference. Result has 389 places, 547 transitions, 8433 flow [2024-06-14 12:03:49,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8337, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8433, PETRI_PLACES=389, PETRI_TRANSITIONS=547} [2024-06-14 12:03:49,777 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 344 predicate places. [2024-06-14 12:03:49,777 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 547 transitions, 8433 flow [2024-06-14 12:03:49,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:49,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:49,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:49,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 12:03:49,778 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:49,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:49,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1504428260, now seen corresponding path program 1 times [2024-06-14 12:03:49,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:49,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653188544] [2024-06-14 12:03:49,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:49,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:49,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:50,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:50,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:50,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653188544] [2024-06-14 12:03:50,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653188544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:50,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:50,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:03:50,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555464197] [2024-06-14 12:03:50,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:50,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:03:50,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:50,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:03:50,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:03:50,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:03:50,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 547 transitions, 8433 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:50,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:50,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:03:50,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:54,007 INFO L124 PetriNetUnfolderBase]: 6206/9513 cut-off events. [2024-06-14 12:03:54,008 INFO L125 PetriNetUnfolderBase]: For 2329232/2329240 co-relation queries the response was YES. [2024-06-14 12:03:54,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99169 conditions, 9513 events. 6206/9513 cut-off events. For 2329232/2329240 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 57155 event pairs, 1518 based on Foata normal form. 4/9486 useless extension candidates. Maximal degree in co-relation 98982. Up to 9158 conditions per place. [2024-06-14 12:03:54,183 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 508 selfloop transitions, 31 changer transitions 0/578 dead transitions. [2024-06-14 12:03:54,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 578 transitions, 9662 flow [2024-06-14 12:03:54,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:03:54,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:03:54,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 12:03:54,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-14 12:03:54,184 INFO L175 Difference]: Start difference. First operand has 389 places, 547 transitions, 8433 flow. Second operand 9 states and 162 transitions. [2024-06-14 12:03:54,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 578 transitions, 9662 flow [2024-06-14 12:04:01,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 578 transitions, 9550 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-14 12:04:01,194 INFO L231 Difference]: Finished difference. Result has 390 places, 550 transitions, 8442 flow [2024-06-14 12:04:01,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8327, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8442, PETRI_PLACES=390, PETRI_TRANSITIONS=550} [2024-06-14 12:04:01,195 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 345 predicate places. [2024-06-14 12:04:01,195 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 550 transitions, 8442 flow [2024-06-14 12:04:01,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:01,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:01,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:01,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 12:04:01,196 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:01,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:01,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1504071760, now seen corresponding path program 5 times [2024-06-14 12:04:01,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:01,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382071819] [2024-06-14 12:04:01,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:01,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:01,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:02,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:02,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:02,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382071819] [2024-06-14 12:04:02,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382071819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:02,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:02,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:04:02,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711539614] [2024-06-14 12:04:02,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:02,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:04:02,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:02,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:04:02,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:04:02,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:04:02,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 550 transitions, 8442 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:02,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:02,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:04:02,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:05,650 INFO L124 PetriNetUnfolderBase]: 6223/9539 cut-off events. [2024-06-14 12:04:05,650 INFO L125 PetriNetUnfolderBase]: For 2379470/2379475 co-relation queries the response was YES. [2024-06-14 12:04:05,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99679 conditions, 9539 events. 6223/9539 cut-off events. For 2379470/2379475 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 57216 event pairs, 1487 based on Foata normal form. 4/9513 useless extension candidates. Maximal degree in co-relation 99491. Up to 9203 conditions per place. [2024-06-14 12:04:05,803 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 521 selfloop transitions, 24 changer transitions 0/584 dead transitions. [2024-06-14 12:04:05,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 584 transitions, 9728 flow [2024-06-14 12:04:05,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:04:05,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:04:05,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-14 12:04:05,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-06-14 12:04:05,805 INFO L175 Difference]: Start difference. First operand has 390 places, 550 transitions, 8442 flow. Second operand 10 states and 175 transitions. [2024-06-14 12:04:05,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 584 transitions, 9728 flow [2024-06-14 12:04:13,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 584 transitions, 9661 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 12:04:13,134 INFO L231 Difference]: Finished difference. Result has 392 places, 552 transitions, 8508 flow [2024-06-14 12:04:13,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8375, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8508, PETRI_PLACES=392, PETRI_TRANSITIONS=552} [2024-06-14 12:04:13,134 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 347 predicate places. [2024-06-14 12:04:13,135 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 552 transitions, 8508 flow [2024-06-14 12:04:13,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:13,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:13,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:13,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 12:04:13,135 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:13,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:13,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1043058036, now seen corresponding path program 6 times [2024-06-14 12:04:13,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:13,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082679255] [2024-06-14 12:04:13,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:13,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:13,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:14,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:14,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:14,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082679255] [2024-06-14 12:04:14,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082679255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:14,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:14,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:04:14,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343927752] [2024-06-14 12:04:14,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:14,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:04:14,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:14,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:04:14,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:04:14,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:04:14,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 552 transitions, 8508 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:14,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:14,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:04:14,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:17,050 INFO L124 PetriNetUnfolderBase]: 6215/9527 cut-off events. [2024-06-14 12:04:17,050 INFO L125 PetriNetUnfolderBase]: For 2401384/2401389 co-relation queries the response was YES. [2024-06-14 12:04:17,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99651 conditions, 9527 events. 6215/9527 cut-off events. For 2401384/2401389 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 57257 event pairs, 1513 based on Foata normal form. 4/9501 useless extension candidates. Maximal degree in co-relation 99462. Up to 9169 conditions per place. [2024-06-14 12:04:17,344 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 517 selfloop transitions, 30 changer transitions 0/586 dead transitions. [2024-06-14 12:04:17,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 586 transitions, 9804 flow [2024-06-14 12:04:17,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:04:17,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:04:17,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-14 12:04:17,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-14 12:04:17,346 INFO L175 Difference]: Start difference. First operand has 392 places, 552 transitions, 8508 flow. Second operand 10 states and 176 transitions. [2024-06-14 12:04:17,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 586 transitions, 9804 flow [2024-06-14 12:04:23,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 586 transitions, 9689 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-14 12:04:23,089 INFO L231 Difference]: Finished difference. Result has 394 places, 554 transitions, 8545 flow [2024-06-14 12:04:23,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8393, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8545, PETRI_PLACES=394, PETRI_TRANSITIONS=554} [2024-06-14 12:04:23,090 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 349 predicate places. [2024-06-14 12:04:23,090 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 554 transitions, 8545 flow [2024-06-14 12:04:23,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:23,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:23,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:23,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 12:04:23,091 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:23,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:23,091 INFO L85 PathProgramCache]: Analyzing trace with hash -160610116, now seen corresponding path program 5 times [2024-06-14 12:04:23,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:23,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013044546] [2024-06-14 12:04:23,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:23,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:23,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:23,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:23,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:23,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013044546] [2024-06-14 12:04:23,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013044546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:23,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:23,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:04:23,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558753644] [2024-06-14 12:04:23,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:23,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:04:23,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:23,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:04:23,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:04:24,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:04:24,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 554 transitions, 8545 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:24,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:24,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:04:24,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:26,677 INFO L124 PetriNetUnfolderBase]: 6284/9628 cut-off events. [2024-06-14 12:04:26,678 INFO L125 PetriNetUnfolderBase]: For 2523428/2523431 co-relation queries the response was YES. [2024-06-14 12:04:26,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102180 conditions, 9628 events. 6284/9628 cut-off events. For 2523428/2523431 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 57879 event pairs, 1587 based on Foata normal form. 8/9597 useless extension candidates. Maximal degree in co-relation 101990. Up to 9139 conditions per place. [2024-06-14 12:04:26,968 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 497 selfloop transitions, 63 changer transitions 0/590 dead transitions. [2024-06-14 12:04:26,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 590 transitions, 10568 flow [2024-06-14 12:04:26,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:04:26,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:04:26,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 12:04:26,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2024-06-14 12:04:26,970 INFO L175 Difference]: Start difference. First operand has 394 places, 554 transitions, 8545 flow. Second operand 8 states and 146 transitions. [2024-06-14 12:04:26,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 590 transitions, 10568 flow [2024-06-14 12:04:32,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 590 transitions, 10444 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-14 12:04:32,442 INFO L231 Difference]: Finished difference. Result has 395 places, 571 transitions, 8926 flow [2024-06-14 12:04:32,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8421, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8926, PETRI_PLACES=395, PETRI_TRANSITIONS=571} [2024-06-14 12:04:32,442 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 350 predicate places. [2024-06-14 12:04:32,442 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 571 transitions, 8926 flow [2024-06-14 12:04:32,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:32,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:32,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:32,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 12:04:32,443 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:32,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:32,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1774183829, now seen corresponding path program 4 times [2024-06-14 12:04:32,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:32,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251266957] [2024-06-14 12:04:32,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:32,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:32,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:33,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:33,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:33,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251266957] [2024-06-14 12:04:33,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251266957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:33,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:33,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:04:33,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735975228] [2024-06-14 12:04:33,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:33,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:04:33,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:33,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:04:33,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:04:33,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:04:33,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 571 transitions, 8926 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:33,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:33,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:04:33,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:36,229 INFO L124 PetriNetUnfolderBase]: 6294/9642 cut-off events. [2024-06-14 12:04:36,230 INFO L125 PetriNetUnfolderBase]: For 2534293/2534296 co-relation queries the response was YES. [2024-06-14 12:04:36,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102695 conditions, 9642 events. 6294/9642 cut-off events. For 2534293/2534296 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 57977 event pairs, 1617 based on Foata normal form. 4/9607 useless extension candidates. Maximal degree in co-relation 102503. Up to 9373 conditions per place. [2024-06-14 12:04:36,587 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 519 selfloop transitions, 36 changer transitions 0/585 dead transitions. [2024-06-14 12:04:36,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 585 transitions, 10138 flow [2024-06-14 12:04:36,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:04:36,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:04:36,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 12:04:36,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835227272727273 [2024-06-14 12:04:36,589 INFO L175 Difference]: Start difference. First operand has 395 places, 571 transitions, 8926 flow. Second operand 8 states and 135 transitions. [2024-06-14 12:04:36,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 585 transitions, 10138 flow [2024-06-14 12:04:43,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 585 transitions, 9803 flow, removed 100 selfloop flow, removed 5 redundant places. [2024-06-14 12:04:43,399 INFO L231 Difference]: Finished difference. Result has 398 places, 575 transitions, 8750 flow [2024-06-14 12:04:43,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8591, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8750, PETRI_PLACES=398, PETRI_TRANSITIONS=575} [2024-06-14 12:04:43,400 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 353 predicate places. [2024-06-14 12:04:43,401 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 575 transitions, 8750 flow [2024-06-14 12:04:43,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:43,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:43,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:43,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 12:04:43,401 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:43,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:43,402 INFO L85 PathProgramCache]: Analyzing trace with hash -363397422, now seen corresponding path program 6 times [2024-06-14 12:04:43,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:43,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227567111] [2024-06-14 12:04:43,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:43,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:43,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:44,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:44,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:44,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227567111] [2024-06-14 12:04:44,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227567111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:44,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:44,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:04:44,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019103918] [2024-06-14 12:04:44,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:44,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:04:44,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:44,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:04:44,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:04:44,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:04:44,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 575 transitions, 8750 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:44,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:44,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:04:44,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:47,319 INFO L124 PetriNetUnfolderBase]: 6276/9618 cut-off events. [2024-06-14 12:04:47,319 INFO L125 PetriNetUnfolderBase]: For 2559656/2559659 co-relation queries the response was YES. [2024-06-14 12:04:47,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101387 conditions, 9618 events. 6276/9618 cut-off events. For 2559656/2559659 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 57815 event pairs, 1582 based on Foata normal form. 8/9587 useless extension candidates. Maximal degree in co-relation 101194. Up to 9142 conditions per place. [2024-06-14 12:04:47,635 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 496 selfloop transitions, 68 changer transitions 0/594 dead transitions. [2024-06-14 12:04:47,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 594 transitions, 10445 flow [2024-06-14 12:04:47,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:04:47,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:04:47,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 12:04:47,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2024-06-14 12:04:47,636 INFO L175 Difference]: Start difference. First operand has 398 places, 575 transitions, 8750 flow. Second operand 8 states and 146 transitions. [2024-06-14 12:04:47,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 594 transitions, 10445 flow [2024-06-14 12:04:53,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 594 transitions, 10268 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-14 12:04:53,989 INFO L231 Difference]: Finished difference. Result has 399 places, 576 transitions, 8754 flow [2024-06-14 12:04:53,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8576, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8754, PETRI_PLACES=399, PETRI_TRANSITIONS=576} [2024-06-14 12:04:53,989 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 354 predicate places. [2024-06-14 12:04:53,990 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 576 transitions, 8754 flow [2024-06-14 12:04:53,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:53,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:53,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:53,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 12:04:53,990 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:53,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:53,991 INFO L85 PathProgramCache]: Analyzing trace with hash -160177666, now seen corresponding path program 7 times [2024-06-14 12:04:53,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:53,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850947141] [2024-06-14 12:04:53,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:53,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:53,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:54,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:54,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:54,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850947141] [2024-06-14 12:04:54,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850947141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:54,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:54,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:04:54,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867896891] [2024-06-14 12:04:54,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:54,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:04:54,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:54,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:04:54,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:04:54,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:04:54,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 576 transitions, 8754 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:54,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:54,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:04:54,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:57,552 INFO L124 PetriNetUnfolderBase]: 6264/9603 cut-off events. [2024-06-14 12:04:57,552 INFO L125 PetriNetUnfolderBase]: For 2552259/2552262 co-relation queries the response was YES. [2024-06-14 12:04:57,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101032 conditions, 9603 events. 6264/9603 cut-off events. For 2552259/2552262 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 57750 event pairs, 1590 based on Foata normal form. 8/9572 useless extension candidates. Maximal degree in co-relation 100838. Up to 9271 conditions per place. [2024-06-14 12:04:57,698 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 522 selfloop transitions, 39 changer transitions 0/591 dead transitions. [2024-06-14 12:04:57,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 591 transitions, 10162 flow [2024-06-14 12:04:57,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:04:57,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:04:57,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 12:04:57,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-06-14 12:04:57,699 INFO L175 Difference]: Start difference. First operand has 399 places, 576 transitions, 8754 flow. Second operand 8 states and 140 transitions. [2024-06-14 12:04:57,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 591 transitions, 10162 flow [2024-06-14 12:05:04,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 591 transitions, 9854 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-14 12:05:04,328 INFO L231 Difference]: Finished difference. Result has 401 places, 576 transitions, 8534 flow [2024-06-14 12:05:04,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8446, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8534, PETRI_PLACES=401, PETRI_TRANSITIONS=576} [2024-06-14 12:05:04,328 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 356 predicate places. [2024-06-14 12:05:04,328 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 576 transitions, 8534 flow [2024-06-14 12:05:04,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:04,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:04,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:04,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 12:05:04,329 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:05:04,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:04,330 INFO L85 PathProgramCache]: Analyzing trace with hash -145372531, now seen corresponding path program 1 times [2024-06-14 12:05:04,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:04,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487997143] [2024-06-14 12:05:04,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:04,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:04,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:05,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:05,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:05,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487997143] [2024-06-14 12:05:05,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487997143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:05,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:05,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:05:05,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89911653] [2024-06-14 12:05:05,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:05,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:05:05,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:05,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:05:05,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:05:05,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:05:05,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 576 transitions, 8534 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:05,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:05,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:05:05,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand